ASHRAE 90.1-2007

Section: 9.2.2.3 - Interior Lighting Power

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The interior lighting power allowance for a building or a separately metered or permitted portion of a building shall be determined by either the Building Area Method described in 9.5 or the Space-by-Space Method described in 9.6. Trade-offs of interior lighting power allowance among portions of the building for which a different method of calculation has been used are not permitted. The installed interior lighting power identified in accordance with 9.1.3 shall not exceed the interior lighting power allowance developed in accordance with 9.5 or 9.6.     New in 2007

Exceptions:

The following lighting equipment and applications shall not be considered when determining the interior lighting power allowance developed in accordance with 9.5 or 9.6, nor shall the wattage for such lighting be included in the installed interior lighting power identified in accordance with 9.1.3. However, any such lighting shall not be exempt unless it is an addition to general lighting and is controlled by an independent control device.

1. Display or accent lighting that is an essential element for the function performed in galleries, museums, and monuments.
2. Lighting that is integral to equipment or instrumentation and is installed by its manufacturer.
3. Lighting specifically designed for use only during medical or dental procedures and lighting integral to medical equipment.
4. Lighting integral to both open and glass-enclosed refrigerator and freezer cases.
5. Lighting integral to food warming and food preparation equipment.
6. Lighting for plant growth or maintenance.
7. Lighting in spaces specifically designed for use by the visually impaired.
8. Lighting in retail display windows, provided the display area is enclosed by ceiling-height partitions.
9. Lighting in interior spaces that have been specifically designated as a registered interior historic landmark.
10. Lighting that is an integral part of advertising or directional signage.
11. Exit signs.
12. Lighting that is for sale or lighting educational demonstration systems.
13. Lighting for theatrical purposes, including performance, stage, and film and video production.
14. Lighting for television broadcasting in sporting activity areas.
15. Casino gaming areas.
16. Furniture-mounted supplemental task lighting that is controlled by automatic shutoff and complies with Section 9.4.1.4(d).