Specifications

      
P830-TG WITH P8044-31
Report No. 98245
No. Lamps: 1 Type Lamp: 50R20-GE Total Lumens: 410
Fixture Efficiency: 73.0%
S/MH Ratio: 0.7
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 20 2.2 1.1 10
14 0.3 17 3.1 1.5 9
12 0.4 14 4.5 2.2 7
10 0.7 11 7.2 3.6 6
8 1.3 8 13.4 6.7 4
Beam Angle - 74˚ Beam Angle - 41˚
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
             
DISTRIBUTION CURVE INTENSITY DATA
405
399
374
321
251
187
136
97
59
29
6
4
3
2
1
1
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
87 87 87 87 85 85 85 85 81 81 81 78 78 78 75 75 75 73
83 81 79 78 81 79 78 76 77 75 74 74 73 72 71 71 70 68
79 75 73 70 77 74 72 69 72 70 68 70 68 66 68 66 65 64
75 70 67 64 74 69 66 63 68 65 62 66 63 61 64 62 61 59
71 66 62 59 70 65 61 59 64 60 58 62 59 57 61 58 57 55
68 62 58 55 67 61 57 54 60 56 54 59 56 53 58 55 53 52
65 58 54 51 63 58 54 51 56 53 50 55 52 50 54 52 50 48
61 55 50 47 60 54 50 47 53 50 47 52 49 47 52 49 47 46
59 52 47 44 58 51 47 44 51 47 44 50 46 44 49 46 44 43
56 49 45 42 55 49 45 42 48 44 42 47 44 41 47 44 41 40
53 46 42 39 53 46 42 39 46 42 39 45 42 39 44 41 39 38