12.3.4.8.

(1) The interior lighting power allowance for a building is the sum of the lighting power allowances, in watts, of all building area types and shall include all permanently installed general, task and furniture lighting systems and luminaires.

(2) The interior lighting power allowance shall be determined by multiplying the lighting power density given in Table 12.3.4.8. by the gross lighted areas of the building area type.

(3) The installed interior lighting power shall not exceed the interior lighting power allowance.

(4) Except as provided in Sentence (5), the installed interior lighting power shall include all power used by luminaires, including lamps, ballasts, current regulators and control devices.

(5) The following lighting equipment and applications shall not be considered when determining the installed interior lighting power or the interior lighting power allowance:

(a) lighting that is integral to equipment or instrumentation and is installed by its manufacturer,

(b) lighting specifically designed for use only during medical or dental procedures and lighting integral to medical equipment,

(c) lighting that is integral to both open and glass-enclosed refrigerator and freezer cases,

(d) lighting that is integral to food warming and food preparation equipment,

(e) lighting for plant growth or maintenance,

(f) lighting in spaces specifically designed for use by visually impaired persons,

(g) lighting in retail display windows if the display area is enclosed by ceiling-height partitions,

(h) lighting in interior spaces that have been specifically designated as a heritage building,

(i) lighting that is an integral part of advertising or directional signage,

(j) exit signs,

(k) lighting that is displayed for sale, and

(l) educational lighting demonstration systems.

(6) Trade-offs among building area types are permitted provided that the total installed interior lighting power does not exceed the interior lighting power allowance.