Use quick calculator chart to determine spacing of luminaires
for desired level of illumination.
Conversion Factors:
100W A21, F.C. X 0.6
(6' x 6' x 8.5' room)
(12' x 12' x 8.5' room)
(60' x 60' x 8.5' room)
80% Ceiling; 50% Walls; 20% Floor
Room Surface Reflectances:
2880 Lumens Per Lamp
RCR = 10
RCR = 5
RCR = 1
Clear Alzak with 150W A21
CENTER TO CENTER DISTANCE OF FIXTURES IN FEET
AREA PER FIXTURE IN SQUARE FEET
INITIAL FOOTCANDLES
14
13
12
11
10
9
8
7
6
5
4
3
180
160
140
120
100
80
60
40
20
80
70
60
50
40
30
20
10
Use quick calculator chart to determine spacing of luminaires
for desired level of illumination.
Conversion Factors:
PAR38 FL: 100W(IR), F.C. X 1.5; 120W, F.C. X 1.4; 90W, F.C. X 0.
70W/60W(IR), F.C. X 0.8
BR30 FL: 85W, F.C. X 0.6 (S.R.=0.9); 75W, F.C. X 0.5 (S.R.=0.9);
(6' x 6' x 8.5' room)
(12' x 12' x 8.5' room)
(60' x 60' x 8.5' room)
80% Ceiling; 50% Walls; 20% Floor
Room Surface Reflectances:
1400 Lumens Per Lamp
RCR = 10
RCR = 5
RCR = 1
Clear Alzak with 100W PAR38 FL
CENTER TO CENTER DISTANCE OF FIXTURES IN FEET
AREA PER FIXTURE IN SQUARE FEET
INITIAL FOOTCANDLES
11
10
9
8
7
6
5
4
3
120
100
80
60
40
20
80
70
60
50
40
30
20
10
300
600
90
60
30
900
1200
COEFFICIENTS OF UTILIZATION
%
EFFECTIVE CEILING CAVITY REFLECTANCE
80
70
50
30
10
0
ROOM CA
VITY RA
TIO
20% FLOOR CAVITY REFLECTANCE
Conversion Factor: 45W TO 120W PAR 38 FL, C.U. X 1.0. 65W TO 85W BR30 FL, C.U. X 0.85
50
30 10
50
30
10
50
30
10
50
30
10
50
30
10
0
1.01 1.00 .99 1.00
.98 .97 .96
.95 .94 .93
.92 .91
.90
.89
.89 .87
.97 .95 .93 .96
.94 .92 .93
.92 .90 .91
.89
88
.88
.87
.86 .85
.94 .91 .89 .93
.90 .88 .91
89 .87 .89
.87
86
.87
.86
.85 .84
.91 .88 .86 .90
.88 .85 .89
.86 .84 .87
.85 .83
.85
.84
.83 .82
.88
.85 .83 .87
.84 .82 .86
.84 .82 .85
.83 .81
.84
.82
.80 .79
.86 .83 .81 .85
.82 .80 .84
.82 .80 .83
.81 .79
.82
.80
.79 .78
. 83 .80 .78 .83
.80 .78 .82
.79 .78 .81
.79 .77
.80
.78
.77 .76
.81 .78 .76 .81
.78 .76 .80
.77 .76 .79
.77 .75
.79
.77
.75 .74
.79 .76 .74 .79
.76 .74 .78
.76 .74 .78
.75 .73
.77
.75
.76 .73
.77 .75 .72 .77
.75 .72 .77
74.
72 .76
.74 .72
.76
.73
.72 .71
1
2
3
4
5
6
7
8
9
10
% WALL REFLECTANCE
COEFFICIENTS OF UTILIZATION
%
EFFECTIVE CEILING CAVITY REFLECTANCE
80
70
50
30
10
0
ROOM CA
VITY RA
TIO
20% FLOOR CAVITY REFLECTANCE
50
30
10
50
30
10
50
30
10
50
30
10
50
30
10
0
.68 .66 .65 .66
.65 .64 .64
.63 .62 .62
.61 .60
.59
.59
.58 .57
.63 .61 .58 .62
.60 .58 .60
.58 .57 .58
.57 .55
.56
.55
.54 .53
.59 .56 .53 .58
.55 .53 .56
.54 .52 .55
.53 .51
.53
.52
.50 .49
.55 .51 .49 .54
.51 .48 .53
.50 .48 .51
.49 .47
.50
.48
.47 .46
.51 .47 .44 .50
.47 .44 .49
.46 .44 .48
.45 .43
.47
.45
.43 .42
.47 .43 .41 .47
.43 .41 .46
.43 .40 .45
.42 .40
.44
.42
.40 .39
.44 .40 .37 .43
.40 .37 .42
.39 .37 .42
.39 .37
.41
.38
.36 .35
.41 .37 .34 .40
.36 .34 .39
.36 .34 .39
.36 .34
.38
.35
.33 .33
.37 .34 .31 .37
.33 .31 .37
.33 .31 .36
.33 .31
.35
.33
.31 .30
.35 .31 .28 .35
.31 .28 .34
.31 .28 .34
.30 .28
.33
.30
.28 .27
1
2
3
4
5
6
7
8
9
10
% WALL REFLECTANCE
DEG
CP
ZONAL FLUX
0
1319
0
5
1266
120
15
1080
306
25
1130
523
35
588
369
45
421
326
55
123
110
65
6
6
75
2
2
85
0
0
90
0
0
ZONE
LUMENS
LAMP
FIXT
0-30
949
32.9
53.8
0-40
1318
45.8
74.8
0-60
1754
60.9
99.5
0-90
1763
61.2
100.0
90-180
0.0
0.0
0.0
0-180
1763
61.2
100.0
ZONAL SUMMARY
CANDLEPOWER SUMMARY
400
90
60
30
1200
1600
800
DEG
CP
ZONAL FLUX
0
4932
5
4382
404
10
3249
15
1805
541
20
777
25
373
196
30
173
35
72
57
40
45
45
38
30
50
34
55
29
20
60
0
65
0
0
70
0
75
0
0
80
0
85
0
0
90
0
ZONE
LUMENS
LAMP
FIXT
0-30
1141
81.56
91.37
0-40
1198
85.64
95.94
0-60
1249
89.25
99.99
0-90
1249
89.26
100.00
40-90
50
3.63
4.06
60-90
0
.01
.01
90-180
0
.00
.00
0-180
1249
89.26
100.00
ZONAL SUMMARY
CANDLEPOWER SUMMARY
Spacing Ratio = 1.1
Spacing Ratio = 0.4
Tested According to IES proce-
dures. Test distance exceeds five
times the greatest luminous open-
ing of Luminaire.
Certified test report No. 0847FR
Computed by LSI program
Efficiency = 89.3%
ITL, Inc. report No. 21590
Date: 2-9-77
Efficiency: 61.2%
150W A21
150W A21
Calculite
®
Incandescent Surface Cylinder
7018AO
Page 2 of 2
6” Aperture A Lamp / BR30 / PAR38
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.
© 2004 Genlyte Thomas Group LLC (Lightolier Division) • B0704
Job Information
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