13-415.AB.1.4 Exterior lighting control. Lighting for all exterior applications not exempted in Section 13-415.0 shall have automatic controls capable of turning off exterior lighting when sufficient daylight is available, or when the lighting is not required during nighttime hours. Lighting not designated for dusk-to-dawn operation shall be controlled by an astronomical time switch. Lighting designated for dusk-to-dawn operation shall be controlled by an astronomical time switch or photosensor. Astronomical time switches shall be capable of retaining programming and the time setting during loss of power for a period of at least 10 hours.
Exception: Lighting for covered vehicle entrances or exits from buildings or parking structures where required for safety, security, or eye adaptation.
13-415.AB.2 Exterior lighting.
13-415.AB.2.1 Exterior building grounds lighting. All exterior building grounds luminaires that operate at greater than 100 watts shall contain lamps having a minimum efficacy of 60 lm/W unless the luminaire is controlled by a motion sensor or qualifies for one of the exceptions under Sections 13-415.0 and 13-415.AB.2.2.
13-415.AB.2.2 Exterior building lighting power. The total exterior lighting power allowance for all exterior building applications is the sum of the individual lighting power densities permitted in Table 13-415.AB.2.2 for these applications, plus an additional unrestricted allowance of 5% of that sum. Trade-offs are allowed only among exterior lighting applications listed in the Table 13-415.AB.2.2 "Tradable Surfaces" section. Exterior lighting for all applications (except those included in the exceptions to Sections 13-415.0 and this section) shall comply with the requirements of Section 13-415.AB.2.1.
Exceptions: Lighting used for the following exterior applications is exempt when equipped with a control device independent of the control of the nonexempt lighting:
(a) specialized signal, directional, and marker lighting associated with transportation;
(b) advertising signage or directional signage;
(c) Lighting that is integral to equipment or instrumentation and is installed by its manufacturer;
(d) Lighting for theatrical purposes, including performance, stage, film and video production;
(e) Lighting for athletic playing areas;
(f) Temporary lighting;
(g) Lighting for industrial production, material handling, transportation sites and associated storage areas;
(h) Theme elements in theme/amusement parks; and
(i) Lighting used to highlight features of public monuments and registered historic landmark structures or buildings.
