Meet the requirements of Section 9.5, Building Area Method; or Section 9.6 Space-by-Space Method; of ANSI/ASHRAE/IES Standard 90.1-2010 (with errata but without addenda).

AND

For at least 90% of the regularly occupied floor area incorporate at least four of the following interior lighting features. [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. are places 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.] There are two categories: hardware and design.

Hardware

• Use light fixtures with a luminance of less than 12,500cd/m2 above 45 degrees from nadir.  Exceptions include:

• Wallwash fixtures properly aimed at walls, as specified by manufacturer’s data
• Indirect uplighting fixtures, provided there is no view down into these uplights from a regularly occupied space above.

• Use light sources  with a CRIColor-rendering index, or CRI, is a scale of 0 to 100, used by manufacturers of fluorescent, metal halide, and other non-incandescent lighting equipment to describe the visual effect of the light on colored surfaces. Natural daylight is assigned a CRI of 100. of 80 or higher for at least 95%  of the associated con-nected lighting load.  Exceptions include: Lamps or fixtures specifically included in the design to provide colored lighting for effect.
• Use lamps that last a minimum of 24,000 hours for at least 60% of the connected lighting load
• AND use lamps that last a minimum of 6,000 hours for at least 90% of the connected lighting load.

Design:

• Provide suspended, wall-mounted, free-standing or partition-mounted indirect or di-rect/indirect 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. for up to 75% of the connected lighting load.
• Provide a lighting design that meets the following thresholds for average surface brightness (weighted average of surface reflectances):
• Ceilings- 85%:
• Walls- 60%:
• Floors- 30%:
• If furniture is included in the scope of work, provide a lighting design that meets the following thresholds for average surface brightness (weighted average of surface reflectances):
• Work surfaces-50%:
• Movable Partitions-50%:
• Provide a lighting design that has an average wall surface illuminance to average work plane (or surface if defined) illuminance ratio that does not exceed 1:10.
• Provide an electric lighting design that has an average ceiling illuminace to work-surface illuminance ratio (excluding fenestration) that does not exceed 1:10 [The area of the ceiling that shall affect a workstation in an open plan environment shall extend 2x the ceiling height from the center of the workstation (may be drawn and calculated as a rectangle, square, or circle in plan).]

ESTABLISHMENT

For at least 50% of the regularly occupied  floor area, have in place at least four of the following interior lighting features.  There are two categories, hardware and design.

Hardware:

• Use light fixtures have a luminance of less than 12,500cd/m2 above 45 degrees from nadir.  Exceptions include:
• Wallwash fixtures properly aimed at walls, as specified by manufacturer’s data
• Indirect uplighting fixtures, provided there is no view down into these uplights from a regularly occupied space above.

• Use light sources with a CRIColor-rendering index, or CRI, is a scale of 0 to 100, used by manufacturers of fluorescent, metal halide, and other non-incandescent lighting equipment to describe the visual effect of the light on colored surfaces. Natural daylight is assigned a CRI of 100. of 80 or higher for at least 95% of the associated co-nected lighting load.  Exceptions include: Lamps or fixtures specifically included in the design to provide colored lighting for effect.
• Use lamps last a minimum of 24,000 hours for at least 60% of the connected lighting load
• AND use lamps that last a minimum of 6,000 hours for at least 90% of the connected lighting load.

Design:

Suspended, wall-mounted, free-standing or partition-mounted indirect or di-rect/indirect 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. is in place for up to 75% of the connected lighting load.

• Meet the following thresholds for average surface brightness (weighted average of surface reflectances):

• Ceilings (85%):
• Walls (60%):
• Floors (30%):

• Meet the following thresholds for average surface brightness (weighted average of surface reflectances):
• Work surfaces (50%):
• Movable Partitions (50%):
• The average wall surface illuminance to average work plane (or surface if defined) illuminance ratio does not exceed 1:10.
• The average ceiling illuminace to work-surface illuminance ratio (excluding fenestra-tion) does not exceed 1:10 [The area of the ceiling that shall affect a workstation in an open plan environment shall extend 2x the ceiling height from the center of the workstation (may be drawn and calculated as a rectangle, square, or circle in plan).]

PERFORMANCE

Demonstrate that the interior lighting features have been maintained.