Specifications
P830-TG WITH P8044-31
Report No. 98246
No. Lamps: 1 Type Lamp: 50PAR20/NFL-GE Total Lumens: 570
Fixture Efficiency: 85.5%
S/MH Ratio: 0.4
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 0.9 13 9.3 4.7 6
14 1.3 11 12.8 6.4 5
12 1.9 9 18.8 9.4 4
10 3.0 7 30.2 15.1 3
8 5.6 5 56.2 28.1 2
Beam Angle - 51˚ Beam Angle - 24˚
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
1699
1583
1060
661
395
244
139
66
27
12
6
3
2
0
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
102 102 102 102 99 99 99 99 95 95 95 91 91 91 87 87 87 85
98 96 94 93 96 94 93 91 91 89 88 88 87 86 85 84 83 82
94 91 88 86 92 89 87 85 87 85 83 84 83 81 82 81 79 78
91 86 83 80 89 85 82 79 83 80 78 81 79 77 79 77 76 75
87 82 78 76 86 81 78 75 80 77 74 78 75 73 76 74 73 71
84 79 75 72 83 78 74 71 76 73 71 75 72 70 74 71 70 69
81 75 71 68 80 75 71 68 73 70 68 72 69 67 71 69 67 66
78 72 68 65 77 72 68 65 71 67 65 70 67 64 69 66 64 63
76 69 65 63 75 69 65 63 68 65 62 67 64 62 67 64 62 61
73 67 63 60 73 66 63 60 66 62 60 65 62 60 64 62 60 59
71 64 61 58 70 64 60 58 64 60 58 63 60 58 62 60 58 57