UFC 3 -520-01
June 10, 2002
F-5.2.2 For areas where computer work is constant, comply with IESNA "preferred"
recommendations. This requires the use of either very low brightness direct luminaires,
indirect lighting, or direct/indirect lighting with a very low brightness direct component.
Lay out the lighting systems in strict conformance with ceiling brightness, luminance cut
off, and other characteristics identified by the IESNA.
F-5.3
Other Human Factors.
F-5.3.1 Studies have shown that light can be used effectively to treat several common
problems. These include:
F-5.3.1.1 Seasonal a ffective disorder (SAD), commonly called winter depression. SAD
afflicts some people during the winter months with the effects increasing as latitude
approaches the poles.
F-5.3.1.2 Sleep disorders, especially for personnel who work at night and sleep by day.
Light therapy can be especially effective for personnel assigned to underground
stations. Experiments in shift -work cycle acclimation have been performed successfully
in nuclear power plants and other locations where worker attentiveness is crucial during
midnight shift operations.
F-5.3.1.3 Aid in rapid recovery from jet lag.
F-5.3.2 Light therapies are an evolving area of medical research, and design
implications are just beginning to be understood. When project requirements dictate,
professional design assistance should be used.
F-6
LIGHT SOURCE SELECTION .
F-6.1
Incandescent Lamps.
F-6.1.1 Incandescent lamps include incandescent, tungsten halogen, halogen
infrared reflecting, xenon incandescent, and low voltage lamps.
F-6.1.2 Lighting syste ms using incandescent lamps should be avoided due to the
inefficiency and short lamp life. It is permissible to employ incandescent in applications
where short operating hours or the need for immediate on-off light is required. In
addition, the following specific applications can utilize incandescent lamps:
Special purpose incandescent lamps.
Retail-type display lighting systems employing track lighting and equipped with
tungsten halogen or halogen infrared reflecting lamps.
Table and floor lamps and d ecorative chandeliers in living quarters, food service
facilities, and residential commons facilities.
F-8
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