Interior Lighting .
Fluorescent and high-intensity discharge (HID) lamps are preferred. When HID
lighting is used indoors, color rendition effects on visual and health safety should
be evaluated. Glare and shadows in fixture layouts should be minimized.
Additional standby lighting may be necessary to meet emergency lighting
requirements. The stroboscopic effect from discharge lighting should be
corrected, especially in areas where rotating machinery is present. Fluorescent
or HID lighting fixtures equipped with energy-efficient and high-power-factor
ballasts should be considered. In addition, energy-saving lighting controls should
be considered for new lighting systems.
Emergency lighting units in nonhazardous areas should be connected via a cord
and plug for ease of maintenance. A simplex-type receptacle, preferably a twist-
lock type, should be provided for such a connection.
Lighting fixture types, location, and illumination levels should be coordinated with
the equipment and functions of telecommunication, alarm, and ADP centers to
provide required illumination without
interfering with prompt identification of self-illuminating indicating devices,
creating reflecting glare that might detract from adequate observation of
creating detrimental electrical or electromagnetic interference to proper
operation of equipment.
Exterior Lighting .
High-pressure sodium lighting fixtures with built-in photocell control and high-
power-factor ballasts should be used for outdoor lighting. Where required by
design considerations (e.g., security, street, and fence lighting circuits), contactor