ASHRAE is taking another crack at producing BSR/ASHRAE/IESNA/USGBC Standard 189.1P, Standard for the Design of High-Performance Green Buildings Except Low-Rise Residential Buildings. This is the third public review draft. You may recall this standard had difficulties and the committee creating it was reconstituted last year.

The public review period is 45 days, from May 1 through June 15, 2009.

There are a few provisions related to lighting, as shown below in the section that I excerpted:

7.4.6 Lighting. The lighting shall comply with Section 9 of ASHRAE/IESNA Standard 90.1 with the following modifications and additions:

7.4.6.1 Lighting Power Allowance. The lighting power allowance shall be a maximum of 0.9 multiplied by the values determined in accordance with Sections 9.5 and 9.6. These requirements supersede the requirements in Sections 9.5 and 9.6 of ASHRAE/IESNA Standard 90.1.

7.4.6.2 Occupancy Sensor Controls. Offices 250 ft2 (25 m2) or smaller, classrooms of any size, lecture, training, or vocational rooms of less than 1000 ft2 (100 m2), multipurpose rooms of less than 1000 ft2 (100 m2), and conference rooms and meeting rooms less than 1000 ft2 (100 m2) in hotels, convention, conference, multipurpose and meeting centers shall be equipped with occupant sensor(s) to shut off the lighting. In addition, controls shall be provided that allow manual shutoff of all lights. Occupancy sensors shall be either “manual ON” occupancy sensor or a bi-level “automatic ON” programmed to a low light level combined with multi-level circuitry and “manual ON” switching for higher light levels. Where such spaces are within a daylit area, occupancy sensors shall work in conjunction with daylighting controls complying with 7.4.6.5.

7.4.6.3 Occupancy Sensor Controls with Multi-Level Switching or Dimming. The lighting in the following areas shall be controlled by an occupant sensor with multilevel switching or dimming system that reduces lighting power a minimum of 50% when no persons are present:

a. Multi-family, dormitory, hotel and motel hallways.
b. Commercial and industrial storage stack areas.
c. Library stack areas.

7.4.6.4 Automatic Controls for Egress and Security Lighting. Lighting in any area within a building that is required to be continuously illuminated for reasons of building security or emergency egress shall not exceed 0.5 W/ft2 (5 W/m2). Additional egress and security lighting shall be provided as long as it is controlled by a time switch control device that turns off these additional lights.

7.4.6.5 Automatic Controls for Lighting in Daylight Zones. Lighting in all daylight zones, including daylight zones under skylights and daylight zones adjacent to vertical fenestration, where the combined daylight zone per enclosed space is greater than 250 ft2 (25 m2), shall be provided with controls that automatically reduce lighting power in response to available daylight by either:

a. Continuous daylight dimming, or
b. A combination of stepped switching and daylight-sensing automatic controls, which are capable of incrementally reducing the light level in steps automatically and turning the lights off automatically.

Exceptions to 7.4.6.5:

1. Display and exhibition lighting.
2. Conference rooms greater than 250 ft2 (25 m2) that have a lighting control system with at least four scene options.

7.4.6.6 “Manual ON” Occupancy Sensors. Occupancy sensors shall have“manual ON”, “automatic OFF” controls.

7.4.6.7 Controls for Outdoor Lighting. For lighting of building facades, parking lots, garages, sales and non-sales canopies, and all outdoor sales areas, where two or more luminaires are used, an automatic time switch shall be installed that has the capability to turn off the lighting when not needed and reduce the lighting power (in Watts) of the combined lighting functions indicated by a minimum of 50% or provide continuous dimming through a range that includes 50% through 80% reduction or, where continuously dimming HID sources are used, provide continuous dimming through a
range that includes 25% though 50% reduction.

Exceptions to 7.4.6.7:

1. Lighting required by a health or life safety statute, ordinance, or regulation, including but not limited to, emergency lighting.
2. Lighting that is controlled by a motion sensor and photocontrol.
3. Lighting for facilities that have equal lighting requirements at all hours and are designed to operate continuously.
4. Temporary outdoor lighting.
5. Externally illuminated signs and signs that are internally illuminated or have integral lamps.

UPDATE: Also note there are significant provisions related to light pollution in Section 5.3.3.

For more information, click here.

To download the latest draft of the standard as a PDF file, click here.

Craig DiLouie

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