(P8011-60) Specification Sheet
P87-AT WITH P8011-60
Report No. 98195
No. Lamps: 1 Type Lamp: 75PAR30L/FL-GE Total Lumens: 990
Fixture Efficiency: 72.6%
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 0.4 23 3.7 1.8 13
14 0.5 19 5.1 2.5 11
12 0.7 16 7.4 3.7 9
10 1.2 13 11.9 6.0 7
8 2.2 9 22.2 11.1 5
Beam Angle - 80˚ Beam Angle - 51˚
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
672
648
627
587
537
465
373
250
145
76
43
29
22
18
15
11
8
5
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
86 86 86 86 84 84 84 84 81 81 81 77 77 77 74 74 74 73
82 79 77 75 80 78 76 74 75 73 72 72 71 70 69 68 68 66
77 73 69 67 75 72 68 66 69 67 64 67 65 63 65 63 62 60
72 67 63 60 71 66 62 59 64 61 58 62 60 57 61 58 56 55
68 62 58 54 67 61 57 54 60 56 53 58 55 52 57 54 52 51
64 58 53 49 63 57 52 49 56 52 49 54 51 48 53 50 48 47
61 54 49 45 60 53 49 45 52 48 45 51 47 45 50 47 44 43
58 50 45 42 57 50 45 42 49 45 42 48 44 41 47 44 41 40
55 47 42 39 54 46 42 39 46 42 39 45 41 38 44 41 38 37
52 44 39 36 51 44 39 36 43 39 36 42 39 36 42 38 36 35
49 41 37 34 48 41 37 34 41 37 34 40 36 34 39 36 34 32