Specifications

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P830-TG WITH P8044-28
Report No. 98244
No. Lamps: 1 Type Lamp: 50R20-GE Total Lumens: 410
Fixture Efficiency: 84.0%
S/MH Ratio: 0.8
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 0.2 21 2.3 1.1 10
14 0.3 18 3.1 1.6 9
12 0.5 15 4.6 2.3 7
10 0.7 12 7.4 3.7 6
8 1.4 9 13.7 6.8 4
Beam Angle - 76˚ Beam Angle - 42˚
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
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.= 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
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DISTRIBUTION CURVE INTENSITY DATA
414
412
386
335
268
195
145
107
72
42
16
12
10
8
6
4
3
1
0
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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
100 100 100 100 98 98 98 98 94 94 94 90 90 90 86 86 86 84
95 93 90 88 93 91 89 87 87 86 84 84 83 82 81 80 79 78
90 85 82 78 88 84 81 78 81 78 76 79 76 74 76 74 73 71
85 79 74 71 83 78 74 70 76 72 69 74 71 68 72 69 67 66
80 73 68 65 79 72 68 64 71 67 63 69 65 63 67 64 62 61
76 68 63 59 75 68 63 59 66 62 58 65 61 58 63 60 57 56
72 64 59 55 71 63 58 55 62 58 54 61 57 54 60 56 54 52
68 60 55 51 67 60 54 51 58 54 51 57 53 50 56 53 50 49
65 57 51 48 64 56 51 48 55 51 47 54 50 47 53 50 47 46
62 53 48 45 61 53 48 45 52 48 44 51 47 44 51 47 44 43
59 50 45 42 58 50 45 42 49 45 42 49 45 42 48 44 42 40