Specifications

P87-AT WITH P8072-28
Report No. 98092
No. Lamps: 1 Type Lamp: 65BR30 FL Total Lumens: 770
Fixture Efficiency: 90.3%
S/MH Ratio: 0.9
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 0.3 29 2.6 1.3 12
14 0.4 25 3.6 1.8 11
12 0.5 21 5.2 2.6 9
10 0.8 16 8.4 4.2 7
8 1.6 12 15.6 7.8 5
Beam Angle - 95 Beam Angle - 49
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
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.= 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
470
460
434
396
353
312
275
243
210
173
131
84
44
25
16
10
4
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
107 107 107 107 105 105 105 105 100 100 100 96 96 96 92 92 92 90
101 98 95 92 98 96 93 91 92 90 88 88 87 85 85 84 83 81
94 88 83 79 92 87 82 79 83 80 77 81 78 75 78 76 73 72
87 80 74 69 85 78 73 69 76 71 68 74 70 66 71 68 65 64
81 72 66 61 79 71 65 61 69 64 60 67 63 59 65 62 58 57
76 66 59 54 74 65 59 54 63 58 53 62 57 53 60 56 52 51
71 60 54 49 69 60 53 49 58 52 48 57 52 48 55 51 47 46
66 56 49 44 65 55 48 44 54 48 44 52 47 43 51 47 43 41
62 51 45 40 61 51 44 40 50 44 40 49 43 40 48 43 39 38
58 48 41 37 57 47 41 37 46 40 36 45 40 36 44 40 36 35
55 44 38 34 54 44 38 34 43 37 34 42 37 33 42 37 33 32