Specifications
P830-TG WITH P8044-28
Report No. 98256
No. Lamps: 1 Type Lamp: 50PAR20/NFL-GE Total Lumens: 570
Fixture Efficiency: 93.4%
S/MH Ratio: 0.3
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 1.3 12 12.5 6.3 5
14 1.7 10 17.3 8.6 4
12 2.5 8 25.3 12.7 3
10 4.1 6 40.6 20.3 3
8 7.6 5 75.5 37.8 2
Beam Angle - 47˚ Beam Angle - 19˚
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
2285
1632
1161
627
392
254
132
69
35
22
17
14
11
8
6
4
2
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
111 111 111 111 108 108 108 108 104 104 104 99 99 99 95 95 95 93
106 104 102 100 104 102 100 98 98 97 95 95 94 92 92 91 90 88
102 98 94 92 100 96 93 91 93 91 89 90 88 87 88 86 85 83
98 92 88 85 96 91 87 84 89 86 83 87 84 82 85 82 81 79
94 88 83 80 92 87 83 79 85 81 78 83 80 78 81 79 77 75
90 84 79 75 89 83 78 75 81 77 75 80 76 74 78 75 73 72
87 80 75 72 86 79 75 72 78 74 71 77 73 71 75 72 70 69
84 77 72 69 83 76 72 68 75 71 68 74 70 68 73 70 67 66
81 74 69 66 80 73 69 66 72 68 65 71 68 65 70 67 65 64
78 71 66 63 77 70 66 63 70 66 63 69 65 63 68 65 62 61
76 68 64 61 75 68 64 61 67 63 61 67 63 60 66 63 60 59