CI 2009 EAc1.1: Optimize Energy Performance—Lighting Power

Hi Andreas,

The food display lighting would likely be exempt under ASHRAE 90.1 - 9.6.2b, for merchandise lighting, at 1.0 W/SF. The "novelty" lighting may also be exempt under 9.6.2a, which covers decorative lighting, also at 1.0 W/SF. Both would need to be "automatically controlled, separately from the general lighting, to be turned off during nonbusiness hours."

The ASHRAE User's Manual is a good resource to understand the details of the standard.

For the LEED CI EAC1.1 - Optimize Lighting Power Density, we have previously submitted documentation showing the connected lighting load in each space, and an additional column applying the fixed dimmed level and resulting reduced power. The important thing to verify is that the 70% dimmed level is actually 70% power. A lighting control company might consider 70% of the 0-10V control signal, a lighting designer may want 70% light output, but for LEED this must be 70% of power. You may need to clarify with the controls manufacturer what the 70% is.

Also, you will need to provide a narrative that confirms that this maximum dimmed level is set in the firmware, or is otherwise a permanent setting that cannot be reprogrammed by the end user.

See comment below

http://www.leeduser.com/credit/CI-2009/EAc1.1#comment-18124

I don't think you would inlcude exterior lighting. As a CI project I think the assumption is that the project only inlcudes interior space. Are you including this exterior space for other credits? If you are, then I suppose you could just treat it as an interior space. you woudl sue whatever method (space-by-space or building area) that you are using on the interior. Or use the exterior LPDLighting power density (LPD) is the amount of electric lighting, usually measured in watts per square foot, being used to illuminate a given space. limits in 90.1-2007 (table 9.4.5). But CI EA 1.1 makes no provison for this in the credit langauge or the submittal template.

You're right. We didn't add exterior lighting into credit calculations, but we showed that it is less than exterior LPDLighting power density (LPD) is the amount of electric lighting, usually measured in watts per square foot, being used to illuminate a given space. limits. Our credit has been accepted by the review team. I think this is the most convenient way since the project is subscribed as CI.

David,

EAc1.2 addresses controls so, as has been said in other posts, taking credit under EAc1.1 for controls would be double counting.

In any case, for EAc1.1, Lighting Power, the calculation is strictly installed lighting power vs. the allowed lighting power. The 10% power adjustment you mention is from ASHRAE 90.1, Table G3.2 in Appendix G, which provides guidance on creating energy models. Any energy modeling done for LEED-CI would only marginally take this into account, as part of EAc1.3 Optimize Energy, HVAC, where decreased cooling demand would result from the lights being controlled by occupancy sensors not being on, and thus not creating heat.

I hope this helps,
Dan

You would excluded a room's lighting power, in which less than 50% of the lighting gets replace. However if you also go for credit EA 1.2 lighting control than you will have to still included it into the total lighting power.

the MPR guideline addresses this issue by defining the gross floor areaGross floor area (based on ASHRAE definition) is the sum of the floor areas of the spaces within the building, including basements, mezzanine and intermediate‐floored tiers, and penthouses wi th headroom height of 7.5 ft (2.2 meters) or greater. Measurements m ust be taken from the exterior 39 faces of exterior walls OR from the centerline of walls separating buildings, OR (for LEED CI certifying spaces) from the centerline of walls separating spaces. Excludes non‐en closed (or non‐enclosable) roofed‐over areas such as exterior covered walkways, porches, terraces or steps, roof overhangs, and similar features. Excludes air shafts, pipe trenches, and chimneys. Excludes floor area dedicated to the parking and circulation of motor vehicles. ( Note that while excluded features may not be part of the gross floor area, and therefore technically not a part of the LEED project building, they may still be required to be a part of the overall LEED project and subject to MPRs, prerequisites, and credits.) better. Area with less than 7.5' are excluded. See page 38
http://www.usgbc.org/ShowFile.aspx?DocumentID=6473

Yes. You will have to include them unless you have a the task lights controlled by motion sensors. It's an exception in ASHREA 90.1 2007

Jon, based on the delay in response here I'm sure you've moved on, but my suggestion would be to do as you say, and to also send a feedback note to GBCI about how the form isn't allowing you to make the right selection, and they might upgrade the form or confirm your approach.

Hi Michelle,

Thank you for your question. Since LEED does not set standards, it must refer to other active standards. At the time that LEED CI-2009 was released, the current, active standards wer ASHRAE 90.1-2007, and Title 24-2005. Both of these standards have been updated since LEED CI-2009 was released. ASHRAE 90.1-2010 was released around December 2010, and the current Title 24-2008 was released in January 2010. For more information, please visit:

http://www.energy.ca.gov/title24/

It is likely that these new standards will be worked into the next version of LEED CI, but they do not apply retroactively to LEED CI-2009. I think that this is for good reason. It would be difficult to impossible for a project that is registered for LEED CI-2009 and had already been designed, documented, and is under construction to suddenly be held to a new standard that did not exist when the project was designed.

Regarding your question on ASHRAE Lighting Compliance Interactive Forms, LEED does not require these forms for their submittal. If you are registered to LEED Online, you should be able to download the LEED Letter Template, which is the form that should be filled out.

Does this help clarify your questions?

All the best,
Dane

Hi LEEDUser - First thanks for being an excellent resource. I'm making a general post of some thoughts here because I happen to be looking at this credit for a project, but I think it's a broader issue in how LEED works and how we view green buildings...this idea of "percent better than code".

Dane - while I agree with your logic that we can't expect to move goalposts on projects midstream, I think there's a different issue at hand. The language for EAp2 in CI 2009 seems to penalize projects for better performance by making a more stringent local code the new baseline. So if a progressive state or local agency adopts an energy code that is X% percent better than ASHRAE, a LEED project there will earn fewer points, maybe even fall short of the prereq, even though it is going be more efficient than a building in the jurisdiction next door. If we were using local or regional rating systems, this might make sense, but LEED is national (at least!). This problem seems to be replicated in several areas across LEED and I believe it's being addressed somewhat in LEED 2012.

The bigger picture, though, is that as codes get more stringent, percent-better-than-code becomes less meaningful, especially when that is one of our thresholds for labeling a building "green" or not. Seems like we should focus more on target EUIs....

Just some rambling thoughts - thanks again for all your insights.

I want to make sure that I am clear on the point of the Title 24 standard. Of course we need to follow the latest building code, Title 24-2008. We are planning to follow EAc2 compliance path option 1 "Whole Building Energy Simulation" which references California Title 24-2005 Part 6. I am assuming this is not going to be any issue. Anyone have suggestions or comments?

Hi Liz,

I assume that when you mention "EAc2...option 1" you actually mean EAp2, in LEED-NC. This forum covers LEED-CI, EAc1.1.

In any case, as your question refers to EAp2, your energy model will be based on Title 24-2005, a less stringent code. So this can only help. Without having studied the expected % efficiency improvement between the Title 24-2005 and 2008 codes, I would assume that additional efficiency improvements would need to be pursued to reach the 10% savings threshold for the prerequisite.

I think I can answer my own question, having taken a closer look at the CI rating system - EAc1.2 addresses controls specifically and any attempt at the above is essentially "double dipping"...

I'm commenting on my own comment here. This was submitted under v2 of CI and it looks like, in order to get 2 points we have to hit a 25% reduction.

Hi Leslie,
All projects registered after June 26th 2007 must gain at least two points under EAc1 (see http://www.usgbc.org/ShowFile.aspx?DocumentID=684). If you have an earlier version of the 2.0 reference guide, this change may not be reflected. Are you able to go for any of the other credits in EAc1? 1.4 may be a bit more straightforward to achieve depending on the project and client.

Janika

I'm actually not sure if exterior lighting is within the scope of this credit.

But if exterior lighitng IS included, why would having a timer on it make it not relevant? It's still going to use power, right? This seems akin to having an occupancy sensor on an interior light.

Hi Jason,
Sorry to take so long to get back to you.

Is your question related to LEED for Commercial Interiors EAcredit 1.1 Optimize Energy Performance? If you are working on a Commercial Interiors project, what exterior lighting do you have that relates to this credit?

It seems that your question is related to LEED for New Construction SScredit 8 Light Pollution Reduction, or EAcredit 1 Optimize Energy Performance. For both of these credits, you must include all lighting loads. For EAc1, the LPDLighting power density (LPD) is the amount of electric lighting, usually measured in watts per square foot, being used to illuminate a given space. for all lighting connected to the building's power must be included. If you are using controls that exceed the ASHRAE 90.1 2007 Lighting Controls requirements, these would be accounted for in the Energy Model for EAc1.

I hope this helps. If you can clarify your project and which LEED product you are registered for, I may be able to give you better advice.

Thanks,
Dane

Hi Dane,

we have a 2 stories building with a open carpark + a vegetated roof top. the owner would like to apply for LEED CI, therefore , when we doing the LPDLighting power density (LPD) is the amount of electric lighting, usually measured in watts per square foot, being used to illuminate a given space., we arent sure we need to include the lighting fixture on the open parking and decorative lighting for the vegetated roof into the whole calculation.
though all these exterior light was connected to a timer.

Hi Jason,

Your project sounds unique for a "Commercial Interiors" project. I believe that LEED CI was conceived for tenant finish spaces and not for building grounds, which would be covered by LEED CS.

For your situation, I suggest that you take the more conservative approach. Under LEED CI, the Lighting Power Density is a credit separate from Lighting Controls. For interior lighting, you must include all connected lighting loads, whether they are controlled by daylight sensors, occupancy sensors, or timer controls. For your exterior lighting, this same approach would apply. You should include all exterior lighting in your calculation. The exterior lighting power allowances in ASHRAE 90.1 2007 are very generous. Too generous in my opinion. Our typical exterior lighting projects are 50% - 80% below the ASHRAE exterior LPDLighting power density (LPD) is the amount of electric lighting, usually measured in watts per square foot, being used to illuminate a given space. allowance, and are still designed to meet IESNA lighting criteria. So, if you include your exterior LPD in the whole calculation, you may find that it improves your % below ASHRAE and may qualify you for more points.

I do not know how a reviewer will interpret this situation, so your Narrative should describe your process thoroughly.

Best of luck,
Dane

Hi Gahl,
Thanks for your question. This topic is a common source of confusion and varying opinions in the lighting industry. Before I get into discussion about lighting criteria and task-ambient lightingLighting in a space that provides for general wayfinding and visual comfort, in contrast to task lighting, which illuminates a defined area to facilitate specific visual work. strategies, I want to stress that your design must first of all address the needs of your client. This often means educating your client, and may even benefit from some demonstration or mock-up. Perception of brightness and visual quality is more complex than can be described solely by task-plane illuminance, so to say employees over 60 have an aversion to "the darkness" of 30 fc1. A footcandle (fc) is a measure of light falling on a given surface. One footcandle is defined as the quantity of light falling on a 1-square-foot area from a 1 candela light source at a distance of 1 foot (which equals 1 lumen per square foot). Footcandles can be measured both horizontally and vertically by a footcandle meter or light meter. 2. The non-metric measurement of lumens per square foot, one footcandle is the amount of light that is received one foot from a light source called a candela, which is based on the light output of a standardized candle. A common range for interior lighting is 10 to 100 footcandles, while exterior daytime levels can range from 100 to over 10,000 footcandles. Footcandles decrease with distance from the light source. The metric equivalent of a foot candle is 10.76 lux, or lumens per square meter. is likely an over-simplified opinion.

ASHRAE 90.1 - 2007: The LPDLighting power density (LPD) is the amount of electric lighting, usually measured in watts per square foot, being used to illuminate a given space. for ASHRAE does not include plug-loads. So, officially, plug-in task lights do not need to be included. However, if your lighting design is intented to be a task-ambient system and you are specifying the task lights, it seems to be more in-line with the intent of LEED to include them. There are many very good, low wattage LED and CFL1. Compact fluorescent lamp (CFL) – light source in which the tube is folded or twisted into a spiral to concentrate the light output; CFLs are typically 3 to 4 times as efficient as incandescent light bulbs, and they last 8 to 10 times as long. 2. Small fluorescent lamps used as more efficient alternatives to incandescent lighting. Also called PL, CFL, Twin-Tube, or BIAX lamps. (EPA) 3. A light bulb designed to replace screw-in incandescent light bulbs; they are often found in table lamps, wall sconces, and hall and ceiling fixtures of commercial buildings with residential type lights. They combine the efficiency of fluorescent lighting with the convenience of standard incandescent bulbs. Light is produced the same way as other fluorescent lamps. Compact fluorescent bulbs have either electronic or magnetic ballasts. tasklights on the market that will provide plenty of additional light for task specific areas without blowing out your LPD budgets.

Lighting Criteria & the Modern Workplace:
- Traditional Lighting & Criteria: Many clients insist on 50fc avg for their offices. This criteria is based on the IESNA Illuminance Category E, which is based on a task of high contrast and small size. This light level may be appropriate for an employee in their 60's reading black 10-point type on white paper for extended periods of time, or reading blue-line prints.

- Modern Workplace Tasks: Today's workplaces are much more computer task oriented than reading 10-point type or blue-line drawings, so providing 50 fc for the entire office, all day long is not the best use of lighting energy. 30 fc is more than adequate as an ambient base level of illumination for most office tasks today.

Task-Ambient Lighting:
The notion of separating task light and ambient light is to provide an appropriate base illumination level for most tasks (30 fc), then provide individually controlled task lights that can provide 50+ fc for a specific task area for tasks that may require higher light levels. By locating the light source closer to the task area, a higher light level can be provided with much less wattage than could be achieved with the overhead ambient lighting system. The 6W LED tasklight at my desk provides 33 fc on its own, with no ambient light. With 30 fc of ambient light, I have 63 fc availble for specific reading tasks. For only 6W additional in an 80 sqft workstation is only .075 W/SF additional power.

The trick to doing a good task-ambient lighting design is to provide task lights that are low-wattage LED or CFL (6W - 18W) with adjustable position to allow each occupant to adapt the task light to their own preference. Another step is to provide a workstation occupancy sensor to turn off the task lights when the workstation is unoccupied. Additionally, coordinating your design with the furniture layout to provide the 30 fc ambient at the Workstations, and less light for (10fc - 15fc) for Circulation Areas, then you can drive your LPD even lower.

If your client still insists on 50 fc everywhere, you may have a difficult time reducing your LPD to meet your LEED goals.

For more on Low Ambient - Task Lighting, refer to:

http://www.etcc-ca.com/component/content/article/21-Commercial-Office/28...

and

http://www.etcc-ca.com/component/content/article/21-Commercial-Office/28...

I hope this helps,

All the best,
Dane

Thanks Dane this information was very helpful for us in formulating our strategy, and I agree client needs come prior to LEED.

James,
The Building Area type that seems to be the best fit for a bank is "Office". However, if I were evaluating a bank, I would probably opt for the Space-by-Space Method that has space types that are more specific to a bank. In fact, I usually use the Space-by-Space Method during the design phases to dial in each of the spaces, then compare the Space-by-Space Method results to the Building Area Method results to choose which one to document for the final submittal.
All the best,
Dane

Andreas,

This is an interesting question. If you were asking about a LEED NC project, then the 10% occupancy sensor savings could be built into the building energy model. However, since you are dealing with a LEED CI project, it is my understanding that Credit EA c1.1 for Lighting Power Density does not allow for reductions due to lighting controls. The occupancy sensors are accounted for in Credit EA c1.2 Optimize Energy Performance - Lighting Controls - Occupancy Sensors for 75% of the Connected Lighting Load. Since there is a separate point for occupancy sensors, taking credit in the Lighting Power Density EA c1.1 would be double counting the points, therefore is not allowed.

All the best,
Dane

Jose,
Plug-in task lights do not contribute to the LPDLighting power density (LPD) is the amount of electric lighting, usually measured in watts per square foot, being used to illuminate a given space. calculation. There is also an exeption for furniture-mounted task lights listed under ASHRAE 90.1-2007 Section 9.2.2.3(p) that states, "Furniture-mounted supplemental task lighting that is controlled by automatic shutoff and complies with Section 9.4.1.4(d)." Although, I have typically included furniture-mounted task lights in the LPD calculation. The "Additional Lighting Power Allowances" for ASHRAE 90.1-2007 apply to decorative lighting and retail display lighting only.

I hope this helps,
Dane

Hi Dane--

I have been asked by reviewers on at least two LEED-CI 2.0 projects to include plug-in task lighting or write a narrative addressing that task lights are not in the project / or why they should not be included in the LPDLighting power density (LPD) is the amount of electric lighting, usually measured in watts per square foot, being used to illuminate a given space.. We had pursued EQc6.1 - Controllability of Lighting on one of these projects, but not for the other, which makes me think the GBCI asks about task lighting regardless. Just don't want to see anyone surprised in the review stage...

Why do you think that plug-in task lights should not be included? That seems like a potentially big loophole that could stymy the achievement of "increasing levels of energy conservation to reduce the environmental and economic impacts associated with excessive energy use," as per the credit intent, right? I assume that is why you include the furniture mounted task lighting...

Respectfully,
Travis

Travis,
Thanks for sharing your experience. My colleagues and I have found interpretations of credits can vary from one LEED reviewer to another, especially if there is no CIRCredit Interpretation Ruling. Used by design team members experiencing difficulties in the application of a LEED prerequisite or credit to a project. Typically, difficulties arise when specific issues are not directly addressed by LEED information/guide to set a precedent. I searched CIR's in both CI and NC, and it seems that there are none that relate to plug-in task lights. I looked back through a couple of our projects and found that we included the plug-in tasklights for one LEED NC Platinum Project, and excluded them in one LEED CI Platinum Project. However, in the LEED CI Platinum Project, we also included an occupancy controlled receptacle at each workstation to control the tasklight, laptops, monitor, and other non-critical personal loads. Both projects received the energy credits without any comments from the LEED reviewers. In both projects, we coordinated with the architect, and the project LEED champion to determine our approach.

My reading of ASHRAE 90.1 seems very clear that it does not apply to plug-loads. Since the credits use ASHRAE 90.1 as the reference standard, it seems that they do not need to be included. On the other hand, I cannot disagree that including the task lighting is more true to the intent of the credit. One problem is that the ASHRAE lighting power densities were not developed based on integrated task-ambient lightingLighting in a space that provides for general wayfinding and visual comfort, in contrast to task lighting, which illuminates a defined area to facilitate specific visual work. solutions.

It seems that a CIR would be the best way to get an official ruling that also sets a precedent for future LEED projects. Is there anyone reading this that has a current relevant project to submit the CIR?

Thanks,
Dane

I agree that getting a CIRCredit Interpretation Ruling. Used by design team members experiencing difficulties in the application of a LEED prerequisite or credit to a project. Typically, difficulties arise when specific issues are not directly addressed by LEED information/guide is the safest course of action here. It's important to note that CIRs are nor currently precedent-setting, however.

Tristan, Thanks for your insight. If CIRs no longer set a precedent, are there any precedent setting interpretations, or is each LEED project subject to the individual interpretation of the reviewer? It seems that consistency amongst reviewers will be a problem without any precedents.

Dane, you are correct to note that consistency could be an issue. This issue is echoed in this article I wrote for Environmental Building News about GBCI ending the CB model, and forum threads like this one on clarification overkill.

USGBC is revising its CIRCredit Interpretation Ruling. Used by design team members experiencing difficulties in the application of a LEED prerequisite or credit to a project. Typically, difficulties arise when specific issues are not directly addressed by LEED information/guide policy to allow for some of them to be precedent setting, with details on that to come out this fall.

Has anyone received a final word on the inclusion of task lighting in the LPDLighting power density (LPD) is the amount of electric lighting, usually measured in watts per square foot, being used to illuminate a given space.? We have been required many times by reviewers to include it -especially when pursuing EQc6.1. We fought it and lost on a couple of projects, so now we just include it. It seems that consistency is even more important now that a 10% LPD reduction is required for the prerequisite.

Hi Nancy,

It sounds like you have received a final word on a number of occasions from reviewers to include task lights in the LPDLighting power density (LPD) is the amount of electric lighting, usually measured in watts per square foot, being used to illuminate a given space. calculation. Just to clarify, were the task lights on your projects plug-in, or permanently hard-wired? It is clear in both ASHRAE and the LEED Reference Guide that "permanently installed general, task, and furniture lighting" must be included.

I have not heard any official policy from GBCI, but I will share some of my thoughts and experience.

The design team for the USGBC Headquarters chose to include plug-in task lights because it was an integral part of our lighting strategy. The task lights were specified by the interior designer, so they were included in the project contract documents. If the task lights are an integral strategy to meet criteria, and are specified as part of the construction documents, then it is my opinion that they should be included to meet the intent of LEED CI Credit EAc1.1.

However, for a LEED NC project for a university classroom/office building, we designed the "general lighting" in the private offices to meet IESNA Criteria. The plug-in task lights were purchased by the Client, therefore were not included in the construction documents. We advised the Client to choose low-wattage CFL1. Compact fluorescent lamp (CFL) – light source in which the tube is folded or twisted into a spiral to concentrate the light output; CFLs are typically 3 to 4 times as efficient as incandescent light bulbs, and they last 8 to 10 times as long. 2. Small fluorescent lamps used as more efficient alternatives to incandescent lighting. Also called PL, CFL, Twin-Tube, or BIAX lamps. (EPA) 3. A light bulb designed to replace screw-in incandescent light bulbs; they are often found in table lamps, wall sconces, and hall and ceiling fixtures of commercial buildings with residential type lights. They combine the efficiency of fluorescent lighting with the convenience of standard incandescent bulbs. Light is produced the same way as other fluorescent lamps. Compact fluorescent bulbs have either electronic or magnetic ballasts. tasklights and to encourage professors to use the tasklights issued to them. In this case, the design team did not have control over the plug-in task lights, therefore they were not included.

If I hear any offical policy from GBCI about how they are interpreting this credit, I will let you know.

Thanks,
Dane

One more thought on this thread about task lighting—I have confirmed what Dane said originally, that the exception stands for 9.2.2.3p furniture mounted, automatic
shut off, and complies with Section 9.4.1.4 (d).

One of our projects just came back from review. We have task lights in the cubicles equipped with motion sensors for each station. We did exclude the task lights from the power density calculation. We didn't clearly state why we didn't include them but we will clarify that and argue that the exception in ASHREA 90.1-2007 section 9.2.2.3p is applicable and we can therefore exclude them from the power density. I'll let you know about the review response.
My though on that is that credit EA 1.2 lighting sensor is meant to be applied to the regular lighting. A sensor for task lightings goes beyond this credit’s intent. Also furniture integrated lighting is something that just changes all the time based on reconfiguration in the space. If you really want to draw a line between task - ambient strategies and your regular office setup than you probably have to require a foot candle plan for each project to see if the task lights are necessary to achieve sufficient light levels or more so additional and for individual comfort.
In fact if we wouldn’t be able to exclude task lighting with motion sensors from the power density calculation in our project than our client wouldn't have the sensors. That would in fact increase the electricity consumption of the project and of course we wouldn't be able to get some of the points. This project has the usual setup of a lot of cubicles, densely together in an open office setting, just like the majority of offices throughout the states. But our client would never eliminate the task lights to get better lighting power density because of occupant’s discomfort. The motion sensored task light therefore is the perfect strategy for reduced electricity consumption, with sufficient overall light levels and the comfort of individual light control in a not fancy, rather densely occupied, standard office space.

Is there any new clarity on the required approach for task lights? For my project, all task lights will be brought over from the existing facility. In this way, the purchasing of the task lights is not part of our scope of work. In much of the same way that it is allowed for you to exclude equipment and appliances that fall outside of scope for EAc1.4, could you exclude the task lights that aren't part of your scope?
Thanks for your help.

Our final design review come back and the exclusion of the motion sensored task lights was excepted. In regards to existing lighting, ASHRAE only makes you apply the power requirements, if you change more than 50% of the light in that space. But in your case your are still bringing in fixtures, which were not existing in the space. I think you will have to include them. If you try to argue with EA c1.4 I would definitely submit an CIRCredit Interpretation Ruling. Used by design team members experiencing difficulties in the application of a LEED prerequisite or credit to a project. Typically, difficulties arise when specific issues are not directly addressed by LEED information/guide. Because from my experience the reviewers deny credits if this approach wasn't somehow done or approve before.

We have a client who purchased all new task lights for their facility before the project started- unfortunately they are T-8's. These are plug in task lights but are mounted to the underside of the existing overhead. Even though it sounds like technically we shouldn't need to include them because they are plug-in, we still would like to have an occupancy sensor just to play it safe. The only solution we can find to retain these fixtures and not have them count in our lighting calcs is plugging it into a wattstopper power strip with occupancy sensor function which would then plug into the standard outlet. Is this a recognized method by USGBC or does the occupancy sensor have to be integral in the fixture for it to be recognized? Your thoughts would be greatly appreciated!

I do not have any experience with trying to use a newer version of LEED to document a project registered under an older version. However, in both LEED CI 2.0 and LEED CI 2009, Credit 1.1 Optimize Energy Performance, Lighting Power only evaluates the connected lighting load or Lighting Power Density (LDP). Getting credit for Daylighting Controls falls under LEED CI 2.0 & 2009 Credit 1.2 Optimize Energy Performance, Lighting Controls. The requirement for CI 2.0 Credit 1.2 is, “Install daylight responsive controls in all regularly occupied spacesRegularly occupied spaces are areas where one or more individuals normally spend time (more than one hour per person per day on average) seated or standing as they work, study, or perform other focused activities inside a building. within 15 feet of windows and under skylights.” In LEED CI 2009, lighting controls are still covered in Credit 1.2, but there are 3 point available. Two possible points for daylight controls and one for occupancy sensor controls.

I hope this helps answer the question.

Dane,

We have a CI project where they are using daylight responsive controls in some non-regularly occupied spacesRegularly occupied spaces are areas where one or more individuals normally spend time (more than one hour per person per day on average) seated or standing as they work, study, or perform other focused activities inside a building. (the central corridors) to reduce lighting loads. That won't count for credit 1.2... do you think we could take the credit for that energy reduction in EAc1.1? Or is this one of those good things to do as a practical matter that doesn't have a tidy fit in a particular LEED credit?

Hi David,

The 2nd point available under EA Credit 1.2 gives credit for "Daylight Controls for 50% of the Lighting Load". This applies to the entire lighting load, including non-regularly occupied spacesRegularly occupied spaces are areas where one or more individuals normally spend time (more than one hour per person per day on average) seated or standing as they work, study, or perform other focused activities inside a building.. If you have enough spaces with access to daylight and with daylight controls installed, then you may qualify for this point. Lighting controls do not apply to EA Credit 1.1, which only addresses Lighting Power Density.

Thanks for the help, Dane.