Page 189 - Solar Power in Building Design The Engineer's Complete Design Resource

INDOOR LIGHTING COMPLIANCE 159

B
Figure 6.10 (Continued )

As a rule, allowed lighting power for a building is determined by one of the fol-
lowing five methods:

1 Complete building method. This method applies to situations when the entire build-
ing’s lighting system is designed and permitted at one time. This means that at least
90 percent of the building has a single primary type of use, such as retail. In the case
of wholesale stores, at least 70 percent of the building area must be used for mer-
chandise sales functions. In some instances this method may be used for an entire
tenant space in a multitenant building where a single lighting power value governs
the entire building.
2 Area category method. This method is applicable for any permit situation, includ-
ing tenant improvements. Lighting power values are assigned to each of the major
function areas of a building, such as offices, lobbies, and corridors.
3 Tailored method. This method is applicable when additional flexibility is needed to
accommodate special task lighting needs in specific task areas. Lighting power