Specifications
P830-TG WITH P8044-28
Report No. 98257
No. Lamps: 1 Type Lamp: 50PAR20/NFL-SYLVANIA Total Lumens: 530
Fixture Efficiency: 91.1%
S/MH Ratio: 0.5
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 0.7 13 7.2 3.6 7
14 1.0 11 10.0 5.0 6
12 1.5 9 14.6 7.3 5
10 2.3 7 23.5 11.7 4
8 4.4 5 43.7 21.8 3
Beam Angle - 53˚ Beam Angle - 28˚
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
1321
1214
939
675
396
217
125
72
38
21
16
13
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
108 108 108 108 106 106 106 106 101 101 101 97 97 97 93 93 93 91
104 101 99 97 101 99 97 96 96 94 93 92 91 90 89 88 87 86
99 95 92 89 97 93 90 88 91 88 86 88 86 84 85 84 82 81
95 90 85 82 93 88 84 81 86 83 80 84 81 79 82 80 78 76
91 85 80 77 89 84 79 76 82 78 75 80 77 75 78 76 74 72
87 80 76 72 86 80 75 72 78 74 71 77 73 71 75 72 70 69
84 77 72 68 83 76 71 68 75 71 68 73 70 67 72 69 67 66
81 73 68 65 79 73 68 65 72 68 65 71 67 64 70 66 64 63
78 70 65 62 77 70 65 62 69 65 62 68 64 62 67 64 61 60
75 67 63 60 74 67 62 59 66 62 59 65 62 59 65 61 59 58
72 65 60 57 71 64 60 57 64 60 57 63 59 57 62 59 57 56