CENTER TO CENTER DISTANCE OF FIXTURES IN FEET
Use quick calculator chart to determine spacing of luminaires for desired level of illumination.
AREA PER FIXTURE IN SQUARE FEET
20 40 60 80 100 120
3 4 5 6 7 8 9 10 11
INITIAL FOOTCANDLES
80
70
60
50
40
30
20
10
Clear Alzak with 2-18W Quad Tube
1200 Lumens Per Lamp
RCR = 1
(60' x 60' x 8.5' room)
RCR = 5
(12' x 12' x 8.5' room)
RCR = 10
(6' x 6' x 8.5' room)
Room Surface Reflectances:
80% Ceiling; 50% Wall; 20% Floor
CENTER TO CENTER DISTANCE OF FIXTURES IN FEET
Use quick calculator chart to determine spacing of luminaires for desired level of illumination.
AREA PER FIXTURE IN SQUARE FEET
Clear Alzak with 2-26W Quad Tube
1800 Lumens Per Lamp
RCR = 1
(60' x 60' x 8.5' room)
RCR = 5
(12' x 12' x 8.5' room)
RCR = 10
(6' x 6' x 8.5' room)
Room Surface Reflectances:
80% Ceiling; 50% Wall; 20% Floor
INITIAL FOOTCANDLES
80
70
60
50
40
30
20
10
20 40 60 80 100 120 140 160
3 4 5 6 7 8 9 10 11 12 13
CANDLEPOWER DATA
IN 2.5 DEGREE STEPS
ALONG 22.5 45 67.5 ACROSS AVERAGE LUMENS
0
821
821
821
821
821
5
819
827
832
840
855
80
10
820
835
848
875
913
15
809
817
838
874
921
238
20
777
767
792
834
864
25
690
673
707
762
749
327
30
593
571
558
623
622
35
435
449
441
492
466
278
40
252
50
282
271
251
45
109
118
121
116 97
101
50
27
30
27
32
18
55
2
3
4
3
3
8
60
1
1
1
1
2
65
0
0 1
1
1
1
70
0
0
0
0
1
75
0
0
0
0
0
0
80
0
0
0
0
0
85
0
0
0
0
0
0
90
0
0
0
0
0
ZONE LUMENS LAMP LUMINAIRE
0-30
644
27.78
62.46
0-40
922
39.76
89.39
0-60
1031
44.45
99.93
0-90
1031
44.48
100.00
40-90
109
4.72
10.61
60-90
0
.03
.07
90-180
0
.00
.00
0-180 1031
44.48
100.00
** EFFICIENCY = 44.5% **
CANDLEPOWER DATA
IN 2.5 DEGREE STEPS
ALONG 22.5 45 67.5 ACROSS AVERAGE LUMENS
0
1225
1225
1225 1225
1225
5
1235
1237
1249 1255
1257
119
10 1258
1268
1286 1300
1310
15 1252
1249
1261 1288
1324
356
20 1174
1161
1176 1224
1232
25 1032
1004
1045 1119
1088
483
30
866
829
825
937
919
35
640
662
642
734
686
411
40
367
374
410
424
395
45
161
171
180
174
136
150
50
38
46
47
43
22
55
2
3
5 5
3
11
60
1
1
1
1
1
65
0
0
0
0
0
0
70
0
0
0
0
0
75
0
0
0
0
0
0
80
0
0
0
0
0
85
0
0
0
0
0
0
90
0
0
0
0
0
ZONE LUMENS LAMP LUMINAIRE
0-30
958
26.62
62.58
0-40
1369
38.04
89.44
0-60
1531
42.53
99.98
0-90
1531
42.53
100.00
40-90
161
4.49
10.56
60-90
0
.01
.02
90-180
0
.00
.00
0-180 1531
42.53
100.00
** EFFICIENCY = 42.5% **
CERTIFIED TEST REPORT NO. 1133FR
COMPUTED BY LSI PROGRAM **TEST-LITE**
CALCULITE LOW PROFILE RECESSED 8” HORIZONTAL COMPACT FLUORESCENT DOWNLIGHT
CAT.#8068CLW/8218LPU, SPECULAR CLEAR REFLECTOR AND CROSS BLADE
2-18W QUAD TUBE G.E. COMPACT FLUORESCENT LAMPS. LUMEN RATING = 1160 LMS.
MAGNETEK BALLAST,CAT.# C218UNVBES,120V AC
CERTIFIED TEST REPORT NO. 1133FR
COMPUTED BY LSI PROGRAM **TEST-LITE**
CALCULITE LOW PROFILE RECESSED 8” HORIZONTAL COMPACT FLUORESCENT DOWNLIGHT
CAT.#8068CLW/8218LPU, SPECULAR CLEAR REFLECTOR AND CROSS BLADE
2-18W QUAD TUBE G.E. COMPACT FLUORESCENT LAMPS. LUMEN RATING = 1160 LMS.
MAGNETEK BALLAST,CAT.# C218UNVBES,120V AC
ROOM
CA
VITY
RA
TIO
COEFFICIENTS OF UTILIZATION
%EFFECTIVE FLOOR CAVITY REFLECTANCE = .20
80
70
50
30
10
50 30 10 50 30 10 50 30 10 50 30 10 50 30 10 0
1
.47 .47 .46 .47 .46 .45 .45.44 .44 .43 .43 .42 .42 .41 .41 .40
2
.45 .43 .42
.44 .43 .41 .43 .41 .40 .41 .40 .40 .40 .39 .39 .38
3
.42 .40 .39
.41 .40 .38 .40 .39 .38 .39 .38 .37 .38 .37 .37 .36
4
.40 .38 .36
.39 .37 .36 .38 .37 .35 .37 .36 .35 .37 .35 .34 .34
5
.37 .35 .33
.37 .35 .33 .36 .34 .33 .35 .34 .33 .35 .33 .32 .32
6
.35 .33 .31
.35 .33 .31 .34 .32 .31 .34 .32 .31 .33 .31 .30 .30
7
.33 .31 .29
.33 .30 .29 .32 .30 .29 .32 .30 .28 .31 .30 .28 .28
8
.31 .29 .27
.31 .28 .27 .30 .28 .27 .30 .28 .27 .29 .28 .26 .26
9
.29 .27 .25
.29 .26 .25 .28 .26 .25 .28 .26 .25 .28 .26 .24 .24
10
.27 .25 .23
.27 .25 .23 .27 .24 .23 .26 .24 .23 .26 .24 .23 .22
ROOM
CA
VITY
RA
TIO
COEFFICIENTS OF UTILIZATION
%EFFECTIVE FLOOR CAVITY REFLECTANCE = .20
80
70
50
30
10
50 30 10 50 30 10 50 30 10 50 30 10 50 30 10 0
1
.50 .49 .48 .49 .48 .47 .47.46 .46 .45 .45 .44 .44 .43 .43 .42
2
.47 .45 .44 .46 .44 .43 .44.43 .42 .43 .42 .41 .42 .41 .41 .40
3
.44 .42 .40 .43 .42 .40 .42.41 .39 .41 .40 .39 .40 .39 .38 .38
4
.41 .39 .38 .41 .39 .37 .40.38 .37 .39 .38 .36 .38 .37 .36 .35
5
.39 .36 .35 .38 .36 .35 .38.36 .34 .37 .35 .34 .36 .35 .34 .33
6
.37 .34 .33 .36 .34 .32 .36.34 .32 .35 .33 .32 .35 .33 .32 .31
7
.34 .32 .30 .34 .32 .30 .34.31 .30 .33 .31 .30 .33 .31 .30 .29
8
.32 .30 .28 .32 .30 .28 .31.29 .28 .31 .29 .28 .31 .29 .28 .27
9
.30 .28 .26 .30 .28 .26 .30.27 .26 .29 .27 .26 .29 .27 .26 .25
10
.28 .26 .24 .28 .26 .24 .28.25 .24 .27 .25 .24 .27 .25 .24 .23
Spacing Ratio= 1:1
Spacing Ratio= 1:1
Calculite
®
Surface Cylinder CFL Downlight
8068/CS8
Page 2 of 2
8 3/4” Aperture Quad Tube Parabolic Louver
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
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