80% Ceiling; 50% Walls; 20% Floor
Room Surface Reflectances:
100 Watt A-19
1750 Lumens Per Lamp
RCR = 10 (Rm. Width - Mtg. Ht. above work plane)
RCR = 5 (Rm. Width - 2 x Mtg. Ht. above work plane)
RCR = 1 (Rm. Width - 10 x Mtg. Ht. above work plane)
Center To Center Distance Of Fixtures In Feet
Area Per Fixture In Square Feet
Initial Footcandles
10
9
8
7
6
5
3
4
105
90
75
60
45
30
15
60
50
40
30
20
10
90
60
30
Coefficients of Utilization
%
Effective Ceiling Cavity Reflectance
80
70
50
30
10
0
Room Cavity Ratio
20% Floor Cavity Reflectance
Conversion Factor: For 100W A19 units with gold reflector, multiply C.U.’s by 0.9.
50 30
10
50
30
10
50
30
10
50
30
10
50
30
10
0
.65 .63 .62 .64
.62 .61 .61
.60 .59 .59
.58 .58
.57
.56 .56 .55
.61 .59 .57 .60
.58 .56 .58
.56 .55 .56
.55 .54
.55
.54 .53 .52
.57 .54 .52 .56
.54 .52 .55
.53 .51 .53
.52 .50
.52
.51 .49 .48
.53 .50 .48 .53
.50 .48 .52
.49 .47 .50
.48 .47
.49
.48 .46 .45
.50 .47 .44 .50
.47 .44 .49
.46 .44 .48
.45 .43
.47
.45 .43 .42
.47 .44 .41 .47
.43 .41 .46
.43 .41 .45
.42 .41
.44
.42 .40 .39
.44 .40 .38 .43
.40 .38 .43
.40 .38 .42
.39 .38
.41
.39 .37 .36
.41 .37 .35 .41
.37 .35 .40
.37 .35 .39
.37 .35
.39
.36 .35 .34
.38 .35 .32 .38
.34 .32 .37
.34 .32 .37
.34 .32
.36
.34 .32 .31
.36 .32 .30 .35
.32 .30 .35
.32 .30 .34
.31 .30
.34
.31 .29 .29
1
2
3
4
5
6
7
8
9
10
% WALL REFLECTANCE
DEG
CP
ZONAL FLUX
0
559
13
5
575
43
10
641
83
15
769
135
20
852
177
25
775
165
30
507
114
35
307
89
40
245
91
45
259
95
50
120
9
55
6
1
60
2
0
65
2
1
70
0
0
75
2
1
80
1
1
85
0
1
ZONE
LUMENS
LAMP
FIXT
0- 30
617
35.4
60.6
0- 40
819
47.1
80.5
0- 60
1014
58.3
99.6
0- 90
1018
58.5
100.0
90- 180
0
0.0
0.0
0- 180
1018
58.5
100.0
ZONAL SUMMARY
Candlepower Summary
Total Luminaire Efficiency = 58.5 %
CIE Type - Direct
Luminous Diameter: 4.500
Spacing Ratio= 1.1
ITL REPORT NO. 31338
DATE 9-27-85
Lamp: 100 Watt A19
Efficiency: 58.5%
Use quick calculator chart to determine spacing of luminaires for desired level of illu-
mination.
Conversion Factor: 100W A19 (gold): F.C. x 0.90
Calculite
®
Incandescent Open Downlight
G7057
Page 2 of 2
4 1/2" Aperture A19 Lamp Horizontal
Lightolier
a Genlyte Thomas Company
www.lightolier.com
631 Airport Road, Fall River, MA 02720 • (508) 679-8131 • Fax (508) 674-4710
We reserve the right to change details of design, materials and finish.
© 2002 Genlyte Thomas Group LLC (Lightolier Division) • A0902
Job Information
Type:
