Specifications

P87-AT WITH P8072-28
Report No. 98094
No. Lamps: 1 Type Lamp: 100A19 - GE Total Lumens: 1710
Fixture Efficiency: 49.3%
S/MH Ratio: 1.6
Single Fixture Data
Ceiling
Ht.(Ft.)
10% Values
Ft.-C Beam Dia.
Zero
Degrees
Ft.-C
50% Values
Ft.-C Beam Dia.
Ft.-C (Footcandles) are initial and measured 2'-6" from floor
16 0.1 39 1.5 0.7 22
14 0.2 34 2.1 1.0 18
12 0.3 28 3.0 1.5 15
10 0.5 22 4.8 2.4 12
8 0.9 16 9.0 4.5 9
Beam Angle - 111 Beam Angle - 77
Quick Calculator Charts
0 100 200 300 400 500
0
6
12
18
24
30
Initial Footcandles
2'6" from floor
Area per Fixture (sq. ft.)
Room Reflectances: 80% Ceiling, 50% Wall, 20% Floor
Ceiling Ht.= 9 ft.
Medium Room - RCR=5.0
120 to 200 square foot area
0 100 200 300 400 500
0
8
16
24
32
40
Initial Footcandles
2'6" from floor
Area per Fixture (sq. ft.)
Room Reflectances: 80% Ceiling, 50% Wall, 20% Floor
Ceiling Ht.= 10 ft.
Large Room - RCR=2.0
1500 to 2500 square foot area
5
15
25
35
45
55
65
75
85
0
5
10
15
20
25
30
35
40
45
50
55
60
65
70
75
80
85
90
DISTRIBUTION CURVE INTENSITY DATA
272
273
274
276
280
287
293
292
281
258
220
158
100
62
36
18
6
2
0
70 50 30 10 70 50 30 10 50 30 10 50 30 10 50 30 10 0
80 70 50 30 10 0
RW
RC
10
9
8
7
6
5
4
3
2
1
0
Effective Floor Cavity Reflectance 0.20
ZONAL CAVITY COEFFICIENTS OF UTILIZATION
59 59 59 59 57 57 57 57 55 55 55 52 52 52 50 50 50 49
54 52 51 49 53 51 50 48 49 48 47 47 46 45 46 45 44 43
50 46 43 41 49 45 43 40 44 41 40 42 40 39 41 39 38 37
46 41 37 35 45 40 37 34 39 36 34 38 35 33 36 34 33 32
42 37 33 29 41 36 32 29 35 31 29 34 31 29 33 30 28 27
39 33 29 25 38 32 28 25 31 28 25 30 27 25 29 27 25 24
36 29 25 22 35 29 25 22 28 25 22 27 24 22 27 24 22 21
33 27 22 20 32 26 22 19 25 22 19 25 22 19 24 21 19 18
31 24 20 17 30 24 20 17 23 20 17 23 19 17 22 19 17 16
29 22 18 16 28 22 18 15 21 18 15 21 18 15 20 17 15 14
27 20 17 14 26 20 16 14 20 16 14 19 16 14 19 16 14 13