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100
90
80
70
60
50
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30
20
10
25 50 75 100 125 150 175 200 225
Area Per Fixture In Square Feet
4 5 6 7 8 9 10 11 12 13 14 15
Center To Center Distance Of Fixtures In Feet
This quick calculator chart determines the number and spacing of 2 It. - 42 Watt PL-T
units with clear reflector: for any level of illumination.
Room Surface Reflectances:
80% Ceiling; 50% Wall; 20% Floor
3200 Lumens Per Lamp
RCR= 1 (Rm. Width= 10xMtg. Ht. above work plane)
RCR= 5 (Rm. Width= 2xMtg. Ht. above work plane)
RCR=10 (Rm. Width= Mtg. Ht. above work plane)
Initial Footcandles
Quick Calculator
Coefficients Of Utilization
% Effective Ceiling Cavity Reflectance
80 70 50 30 10 0
% Wall Reflectance
50 30 10 50 30 10 50 30 10 50 30 10 50 30 10 0
1 .74 .72 .70 .72 .70 .69 .69 .68 .67 .67 .66 .65 .65 .64 .63 .62
2 .67 .64 .61 .66 .63 .61 .64 .61 .59 .62 .60 .58 .60 .58 .57 .56
3 .61 .57 .54 .60 .57 .54 .58 .55 .53 .57 .54 .52 .55 .53 .51 .50
4 .56 .51 .48 .55 .51 .48 .54 .50 .47 .52 .49 .46 .51 .48 .46 .45
5 .51 .46 .43 .50 .46 .43 .49 .45 .42 .48 .44 .42 .47 .44 .41 .40
6 .47 .42 .38 .46 .42 .38 .45 .41 .38 .44 .40 .38 .43 .40 .37 .36
7 .43 .41 .37 .46 .41 .37 .45 .40 .37 .44 .40 .37 .43 .39 .36 .35
8 .39 .35 .31 .39 .34 .31 .38 .34 .31 .37 .34 .31 .37 .33 .31 .30
9 .36 .32 .28 .36 .31 .28 .35 .31 .28 .35 .31 .28 .34 .31 .28 .27
10 .34 .29 .26 .33 .29 .26 .33 .29 .26 .32 .28 .26 .32 .28 .26 .25
20% Floor Cavity Reflectance
Room Cavity Ratio
Spacing Ratio: Along=1.4 Across=1.7
Certified Test Report N0. ITL44463
Independent Testing Laboratories, Inc.
Recessed Calculite Downlight 8038CLIF/8242HE120
8" Aperture Specular Clear Reflector
Two Philips 42-Watt Pl-t 42W/4P Triple U-Tube. Compact Fluorescents.
Horizontal Position. Lumen Rating =3200 Lms
Date: Jan 3, 1996
Prepared For: Lightolier, Fall River, MA
Tested According To IES Procedures.
Test Distance Exceeds Five Times the
Greatest Luminous Opening Of Luminaire.
CA
NDLE POWER SUMMARY
ANGLE 0.0 45.0 90.0 135.0 180.0 FLUX
0 1800 1800 1800 1800 1800
5 1748 1821 1960 1951 1817 184
15 1695 2065 2423 2380 1892 616
25 1828 2305 2516 2461 2082 1048
35 1505 2016 2330 2138 1821 1264
45 1135 1419 1505 1454 1366 1063
55 49 83 63 53 46 142
654333 2 3
751111 1 1
850000 0 0
900000 0
ZONAL LUMENS AND PERCENTAGES
ZONE LUMENS % LAMP %LUMINAIRE
0-30 1847 28.9 42.8
0-40 3112 48.6 72.0
0-60 4316 67.4 99.9
0-90 4320 67.5 100.0
90-180 0 0.0 0.0
0-180 4320 67.5 100.0
** Efficiency =67.5% **
45
15
90
60
30
0
800
1600
2400
75
45
15
90
60
30
0
700
1400
2100
75
0-deg:
90-deg:
180-deg:
0-deg:
90-deg:
180-deg:
100
90
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60
50
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30
20
10
25 50 75 100 125 150 175 200 225
Area Per Fixture In Square Feet
4 5 6 7 8 9 10 11 12 13 14 15
Center To Center Distance Of Fixtures In Feet
This quick calculator chart determines the number and spacing of 2 It. - 32 W PL-T units
with clear reflector: for any level of illumination.
For 26W lamps, multiply F.C. by 0.8.
Quick Calculator
32W
Initial Footcandles
Room Surface Reflectances:
80% Ceiling; 50% Wall; 20% Floor
2400 Lumens Per Lamp
RCR= 1 (Rm. Width= 10xMtg. Ht. above work plane)
RCR= 5 (Rm. Width= 2xMtg. Ht. above work plane)
RCR=10 (Rm. Width= Mtg. Ht. above work plane)
Spacing Ratio: Along=1.4 Across=1.6
Certified Test Report N0. ITL44462
(Based on recessed fixture 8038CLW/8232HE120)
Independent Testing Laboratories, Inc.
Recessed Calculite Downlight 8038CLIF/8232HE120
8" Aperture Specular Clear Reflector
Two Philips 32-Watt 32W/35/4P Triple U-Tube. Compact Fluorescents.
Horizontal Position. Lumen Rating =2400 Lms
CANDLE POWER SUMMARY
ANGLE 0.0 45.0 90.0 135.0 180.0 FLUX
0 1499 1499 1499 1499 1499
5 1502 1555 1643 1573 1426 152
15 1546 1829 2017 1862 1330 505
25 1628 2073 2090 1747 1440 844
35 1312 1820 1842 1573 1242 1007
45 823 1034 1242 1222 1181 849
55 31 55 61 58 61 118
65 2 2322 3
75 1 1111 1
85 0 0000 0
90 0 0000
ZONAL LUMENS AND PERCENTAGES
ZONE LUMENS % LAMP %LUMINAIRE
0-30 1500 31.3 43.1
0-40 2508 52.2 72.1
0-60 3475 72.4 99.9
0-90 3479 72.5 100.0
90-180 0 0.0 0.0
0-180 3479 72.5 100.0
**Efficiency = 72.5% **
Coefficients Of Utilization
% Effective Ceiling Cavity Reflectance
80 70 50 30 10 0
% Wall Reflectance
50 30 10 50 30 10 50 30 10 50 30 10 50 30 10 0
1 79 .77 .75 .78 .76 .74 .75 .73 .72 .72 .71 .70 .69 .68 .68 .66
2 .72 .69 .66 .71 .68 .65 .69 .66 .64 .66 .64 .62 .64 .62 .61 .60
3 .66 .62 .58 .65 .61 .58 .63 .59 .57 .61 .58 .56 .59 .57 .55 .54
4 .60 .55 .52 .59 .55 .51 .58 .54 .51 .56 .53 .50 .55 .52 .49 .48
5 .55 .50 .46 .54 .49 .46 .53 .49 .45 .51 .48 .45 .50 .47 .44 .43
6 .50 .45 .41 .50 .45 .41 .48 .44 .41 .47 .43 .40 .46 .43 .40 .39
7 .46 .41 .37 .46 .41 .37 .45 .40 .37 .44 .40 .37 .43 .39 .36 .35
8 .42 .37 .34 .42 .37 .34 .41 .37 .33 .40 .36 .33 .40 .36 .33 .32
9 .39 .34 .31 .39 .34 .31 .38 .34 .30 .37 .33 .30 .37 .33 .30 .29
10 .36 .31 .28 .36 .31 .28 .35 .31 .28 .35 .31 .28 .34 .30 .28 .26
20% Floor Cavity Reflectance. For 26W lamps, multiply C.U. by 1.1.
Room Cavity Ratio
Date: Dec 4, 1995 Tested According To IES Procedures.
Test Distance Exceeds Five Times the
Greatest Luminous Opening Of Luminaire.
42W
800
1600
2400
Calculite
®
Compact Fluorescent Surface Cylinder CS8232/42
Page 2 of 2 8" Aperture Triple Tube (4-Pin) Ceiling & Wall Mount
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.
© 2003 Genlyte Thomas Group LLC (Lightolier Division) • B0303
Job Information Type: