Specification Sheet

P87-AT WITH P8068-22A
Report No. 98079
No. Lamps: 1 Type Lamp: 75PAR30 SN - GE Total Lumens: 1100
Fixture Efficiency: 98.5%
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 1.9 12 18.6 9.3 7
14 2.6 11 25.7 12.8 6
12 3.8 9 37.6 18.8 5
10 6.0 7 60.4 30.2 4
8 11.2 5 112.3 56.1 3
Beam Angle - 49 Beam Angle - 28
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
3396
3112
2429
1675
914
430
244
146
81
35
12
5
2
1
0
0
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
117 117 117 117 114 114 114 114 109 109 109 105 105 105 100 100 100 98
113 110 108 107 110 108 107 105 104 103 102 101 100 99 98 97 96 94
109 105 101 99 106 103 100 98 100 98 95 97 95 93 94 93 92 90
104 99 96 92 103 98 95 92 96 93 90 93 91 89 91 89 88 86
101 95 90 87 99 94 90 87 92 88 86 90 87 85 88 86 84 83
97 91 86 83 96 90 86 82 88 85 82 87 83 81 85 83 80 79
94 87 82 79 92 86 82 79 85 81 78 84 80 78 82 79 77 76
91 83 79 76 89 83 78 75 82 78 75 81 77 75 80 77 74 73
88 80 76 72 87 80 75 72 79 75 72 78 74 72 77 74 72 70
85 77 73 70 84 77 73 70 76 72 69 75 72 69 75 71 69 68
82 75 70 67 81 74 70 67 74 70 67 73 69 67 72 69 67 66