Specifications

P87-AT WITH P8072-28
Report No. 98093
No. Lamps: 1 Type Lamp: 75A19 Total Lumens: 1190
Fixture Efficiency: 47.5%
S/MH Ratio: 1.5
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 0.1 43 0.9 0.5 21
14 0.1 37 1.3 0.7 18
12 0.2 30 1.9 1.0 15
10 0.3 24 3.1 1.5 11
8 0.6 18 5.7 2.9 8
Beam Angle - 116 Beam Angle - 75
Quick Calculator Charts
0 100 200 300 400 500
0
4
8
12
16
20
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
173
172
172
171
172
174
176
174
169
162
151
134
90
50
30
15
5
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
56 56 56 56 55 55 55 55 53 53 53 50 50 50 48 48 48 47
52 50 48 47 51 49 47 46 47 46 45 45 44 43 44 43 42 41
48 44 41 39 46 43 40 38 42 39 37 40 38 36 39 37 36 35
44 39 35 32 42 38 35 32 37 34 31 35 33 31 34 32 30 29
40 34 30 27 39 34 30 27 33 29 27 31 29 26 30 28 26 25
37 31 26 23 36 30 26 23 29 26 23 28 25 23 27 25 22 21
34 27 23 20 33 27 23 20 26 23 20 25 22 20 25 22 20 19
31 25 21 18 30 24 20 18 24 20 17 23 20 17 22 19 17 16
29 22 18 16 28 22 18 16 21 18 15 21 18 15 20 17 15 14
27 20 17 14 26 20 16 14 20 16 14 19 16 14 19 16 14 13
25 19 15 12 24 19 15 12 18 15 12 18 15 12 17 14 12 11