A total of 20 Prismalume units and 17 PrismGlo fixtures are used. Under the previous system, the environment was not as well lit, and different tones and colors were provided by the different fixtures. Now, because of the combination of direct and indirect illumination, the environment is uniformly lighted. The levels of uplight provided by the Prismalume and PrismGlo units are 15 percent and 40 percent, respectively. Illumination levels have increased to 20 to 30 footcandles.
Indoor substations require continuous lighting for safety and security.
The Corona I station is similar to the Jamaica Queens facility, with aisles created by cabinets and overhead troughs, and uses a combination of high bay and low bay fixtures. The Corona II has open aisles with Prismalume units installed throughout.