UFC 3-530-01
22 August 2006
Shielded
Beam
Beam Spread Degree
Projection Distance
Type
Range
10 to 18
240 ft and greater
1
18 to 29
200 to 240 ft
2
29 to 46
175 to 200 ft
3
46 to 70
145 to 175 ft
4
70 to 100
105 to 145 ft
5
100 to 130
80 to 105 ft
6
130 and up
under 80 ft
7
5-2.7
Maintenance. Consider luminaire maintenance in the design process. By
selecting long-life sources, the frequency of re-lamping can be reduced. Evaluate the
ability to perform future maintenance in the installed location. For example, lighting in
atriums, high maintenance bays, and other difficult to access lighting can be very hard
to maintain. Determine if the selected design will require a lift or scaffolding just to
replace lights. Lowering devices can be incorporated to bring a pendant-mounted
luminaire to an accessible level. In such cases as atrium applications, consider wall-
mounted luminaires that indirectly light an area. In cases of poor or limited access,
evaluate lighting quality and luminaire life as part of the design.
5-2.7.1
Re-lamping:
5-2.7.1.1 Group relamping should be the principal method of periodically replacing
lights in a given area. Base the group re-lamping frequency on ensuring intended
lighting levels are maintained above minimum levels. Spot re-lamping is not
recommended in this regard because lighting levels will tend to eventually fall below
intended levels. The group re-lamping interval should consider the lamp mortality curve
(provided by the manufacturer for each type of lamp) so that spot re-lamping does not
become an excessive maintenance burden.
5-2.7.1.2 Spot re-lamping should be performed as necessary for appearance and
safety.
5-2.7.1.3 Accessibility. Facility users are usually responsible for lamp replacements at
and below 3 m (10 ft). Evaluate the lighting system design to confirm that users will be
able to periodically replace the installed lamps.
5-3
LAMPS.
5
"Sports and Recreational Area Lighting", Lighting Handbook Reference and Application, Chapter 20,
Ninth Edition (New York: The Illuminating Engineering Society of North America, 2000), p. 20-14.
5-7
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