Specifications

P87-AT WITH P8072-28
Report No. 98091
No. Lamps: 1 Type Lamp: 75PAR30 LN/FL Total Lumens: 985
Fixture Efficiency: 98.6%
S/MH Ratio: 1.1
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 0.4 27 3.8 1.9 14
14 0.5 23 5.2 2.6 12
12 0.8 19 7.6 3.8 10
10 1.2 15 12.2 6.1 8
8 2.3 11 22.7 11.4 6
Beam Angle - 90 Beam Angle - 56
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
687
683
676
654
616
549
462
366
276
196
131
73
33
16
9
5
2
1
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
117 117 117 117 115 115 115 115 109 109 109 105 105 105 100 100 100 98
111 108 105 102 108 105 103 100 101 99 97 98 96 94 94 93 92 90
104 98 94 90 102 96 92 89 93 90 87 90 87 85 87 85 83 81
97 90 84 79 95 88 83 79 86 81 77 83 79 76 81 78 75 73
91 82 76 71 89 81 75 71 79 74 70 77 72 69 75 71 68 66
85 76 69 64 84 75 68 64 73 67 63 71 66 62 70 65 62 60
80 70 63 58 79 69 63 58 67 62 57 66 61 57 65 60 57 55
75 65 58 53 74 64 57 53 63 57 52 61 56 52 60 55 52 50
71 60 53 49 70 59 53 48 58 52 48 57 52 48 56 51 48 46
67 56 49 45 66 55 49 45 54 49 44 53 48 44 53 48 44 43
63 52 46 41 62 52 46 41 51 45 41 50 45 41 49 44 41 39