Specification Sheet

P87-AT WITH P8068-21A
Report No. 98083
No. Lamps: 1 Type Lamp: 75PAR30 SN - GE Total Lumens: 1100
Fixture Efficiency: 104.6%
S/MH Ratio: 0.5
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 2.1 12 20.7 10.4 6
14 2.9 10 28.6 14.3 6
12 4.2 9 41.9 20.9 5
10 6.7 7 67.2 33.6 4
8 12.5 5 125.0 62.5 3
Beam Angle - 49 Beam Angle - 27
Quick Calculator Charts
0 100 200 300 400 500
0
10
20
30
40
50
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
10
20
30
40
50
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
3781
3235
2562
1814
957
454
259
158
88
35
13
7
3
1
1
1
0
0
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
125 125 125 125 122 122 122 122 116 116 116 111 111 111 107 107 107 105
120 118 115 113 117 115 113 112 111 110 108 107 106 105 104 103 102 100
115 111 108 105 113 110 106 104 106 104 102 103 101 99 100 99 97 96
111 106 102 98 109 104 100 97 102 99 96 99 97 94 97 95 93 92
107 101 96 93 105 100 95 92 98 94 91 96 92 90 94 91 89 88
103 96 91 88 102 95 91 88 94 90 87 92 89 86 91 88 85 84
100 92 87 84 98 92 87 84 90 86 83 89 85 82 87 84 82 81
96 89 84 80 95 88 83 80 87 83 80 86 82 79 85 81 79 78
93 85 80 77 92 85 80 77 84 79 76 83 79 76 82 78 76 75
90 82 77 74 89 82 77 74 81 77 74 80 76 73 79 76 73 72
87 79 75 71 86 79 74 71 78 74 71 77 74 71 77 73 71 70