UFC 3 -520-01
June 10, 2002
High Pressure Xenon and Carbon Arc Lamps. High-pressure xenon and
carbon-arc lamps are technologies optimized for searchlights and similar applications.
These sources should only be used in these specialized and unique applications.
SETTING ENVIRONMENTAL AND INSTALLATION REQUIREMENTS.
Wetness. Determine whether "dry", "damp", or "wet" conditions apply. Refer
to NEC Article 100 (I) for the definition of damp, dry, and wet locations.
Environmental Conditions. Determine whether any special environmental
conditions apply, such as a corrosive or explosive atmosphere, extremely cold or hot
locations, marine/salt water atmosphere, clean room, food preparation area, or other
Structural Support. Determine the supporting means for the lighting
systems, including specific considerations for seismic reinforcement and other
. When lighting systems are intended
to be recessed into
mounted onto ceilings, determine the ceiling system type and capacity for lighting,
including plenum height and other factors. Determine whether the ceiling is fire rated.
. Determine the available voltages, frequency, and capacity
power sources for lighting.
. Evaluate the ability
to perform future maintenance
installed location. For example, lighting in atriums, tall lobbies, and banister lighting can
be very hard to maintain. Determine if the selected design will require a lift or
scaffolding just to replace lights. In cases of poor or limited access, evaluate lighting
quality and luminaire life as part of the design.
Accessibility. Facility users are usually responsible for lamp replacements
at and below 3 meters (10 feet). Evaluate the lighting system design to confirm that
users will be able to periodically replace the installed lamps.
F-8.1.1 Select luminaires to distribute light in a manner appropriate for the
application. The following luminaire distributions should be considered for each
F-184.108.40.206 Direct luminaires emit light downward, and include most types of recessed
lighting, such as downlights and troffers, as well as most types of industrial low and
high-bay luminaires. Most office and retail lighting systems use direct luminaires, which
tend to be more efficient, distributing light directly onto the task area. But direct lighting