UFC 3-535-01
17 November 2005
Steady Light
Flashing Light
Intensity
Intensity
Intensity
step
Percentage
Percentage
1
0.16
2.00
2
0.8
2.00
3
4.00
10.00
4
20.00
100.00
5
100.00
100.00
Figure 3-2. Approach Lighting Photometrics
DEGREES
DEGREES
VERTICAL
VERTICAL
5
5
II
II
I
I
DEGREES
15
10
10
15 HORIZONTAL
10
5
5
SEE NOTE 2
5
10
SEE NOTE 2
5
5
5
SEE NOTES 1, 3, 4, 5
A. ELEVATED APPROACH LIGHTS; CENTERLINE
B. SEMIFLUSH WHITE OR RED APPROACH LIGHTS;
300M (1000FT) CROSSBAR (STA 10+00 TO 30+00)
CENTERLINE OR SIDE ROW (STA 1+00 TO 9+00)
I=50% II=10%
I=50% II=10%
a
10.0
14.0
a
7.0
11.5
b
5.0
6.5
b
5.0
6.0
NOTES:
2
2
1. ALL CONTOURS ARE ELLIPSES CALCULATED BY EQUATION X 2 + Y 2 = 1
a
b
2. THE MINIMUM AVERAGE INTENSITY OF THE MAIN BEAM (INSIDE CONTOUR I )
IS 20,000 CD FOR WHITE, OR 5000 CD FOR RED.
3. MAXIMUM INTENSITY SHOULD NOT EXCEED 1.5 TIMES ACTUAL AVERAGE INTENSITY.
4. MINIMUM INTENSITY OF I=50% AND II=10% OF REQUIRED MAIN BEAM INTENSITY.
5. FOR SEMIFLUSH UNITS, THE PORTION OF LIGHT CUT OFF BY THE MOUNTING SURFACE
MAY BE DISREGARDED.
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