UFC 4-171-05
1 January 2005
with change 25 October 2006
3-10.3.3 Interior Lighting
3-10.3.3.1 The lighting system should consist of 2 ft x 4 ft (600 mm by 1,200 mm)
lensed lay-in fluorescent light fixtures in offices, classrooms, corridors, toilets and
general areas. All mechanical and small storage rooms should be provided with
fluorescent strip lighting. All fluorescent light fixtures should be provided with energy
saver lamps and ballasts.
3-10.3.3.2 Emergency lighting should be provided per NFPA 101 utilizing either
battery emergency lighting fixtures or emergency battery backup ballasts in the
fluorescent fixtures. Exit lights with battery backup should be used. All emergency and
exit lights should be connected to the room lighting circuit, ahead of any local switching.
An emergency lighting fixture should be installed in all mechanical rooms.
3-10.3.3.3 Lighting foot-candle levels for the individual areas should conform to
levels as indicated in Chapter 4.
3-10.3.3.4 In calculating foot-candle levels in the office areas, the following criteria for
surface reflectance should be used. A maintenance factor of .7 should be used in the
calculations. Floors: 20% Ceilings: 80% Walls: 50%
3-10.3.3.5
Provide lighting fixtures with appropriate lamps for the function of the
space.
3.10.3.3.6
Provide light switches in lobby areas, utility/equipment spaces, and special
function rooms. Provide dual level switching in conference rooms and classrooms.
3.10.3.3.7
Provide a wall or ceiling mounted combination light switch and passive
infrared motion sensor for light control in private offices. Ceiling-mounted motion
sensors shall be considered for large rooms.
3-10.3.3.8 Provide ceiling-mounted ultrasonic motion sensors for light control in open
office areas, corridors, toilets, locker rooms, storage rooms and physical fitness rooms.
Lighting in unit storage cages should be switched at the end of each row of cages,
rather than within each cage.
3-10.3.3.9 Consider an automatic dimming system utilizing dimming ballasts in
fixtures at spaces or portions of spaces where significant daylighting can reduce artificial
lighting requirements; consider spaces such as lobbies, unit commons, unit storage,
corridors, and assembly hall when daylighting is provided.
3-10.3.4 Special Requirements
3-10.3.4.1 Verify geotechnical report for soil resistivity and provide cathodic
protection or wrapping of ferrous metals as required.
3-10.3.4.2
Provide building lightning protection if the calculations indicate that the
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