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Page 2 of 2
Single Unit
60W BT15
Ht. to Floor
Footcandles
4'
13
6'
6
8'
3
DOWNLIGHT SPACING RATIO = 1.2
COEFFICIENTS OF UTILIZATION
% EFFECTIvE CEILING CAvITy REFLECTANCE
80
70
% WALL REFLECTANCE
50 30 10
50 30 10
50 30 10
0
.43 .43 .43
.42 .42 .42
.40 .40 .40
1
.40 .39 .39
.39 .39 .38
.38 .37 .37
2
.37 .36 .35
.37 .36 .35
.36 .35 .34
3
.35 .33 .32
.34 .33 .32
.33 .32 .31
4
.33 .31 .29
.32 .30 .29
.31 .30 .29
5
.30 .28 .27
.30 .28 .27
.29 .28 .26
6
.28 .26 .25
.28 .26 24
.27 .26 .24
7
.26 .24 .22
.26 .24 .22
.25 .24 .22
8
.24 .22 .21
.24 .22 .20
.24 .22 .20
9
.23 .20 .19
.22 .20 .19
.22 .20 .19
10 .21 .19 .17
.21 .19 .17
.20 .18 .17
20% FLOOR CAvITy REFLECTANCE
To convert lighting data for a lower wattage incandescent lamp of the same type, multiply the
footcandle (or candlepower) values by the ratio of the lumens of the two lamps.The coefficients of
utilization remain the same.
Lytecaster
Beam Dia.
5'
7'
9'
50
30
10
0
50 30 10
50 30 10
0
.38 .38 .38
.37 .37 .37
.36
.37 .36 .36
.35 .35 .35
.34
.35 .34 .33
.34 .33 .32
.32
.33 .32 .31
.32 .31 .30
.30
.31 .29 .28
.30 .29 .28
.27
.29 .27 .26
.28 .27 .26
.25
.27 .25 .24
.26 .25 .24
.23
.25 .23 .22
.25 .23 .22
.21
.23 .22 .20
.23 .21 .20
.20
.22 .20 .19
.21 .20 .18
.18
.20 .18 .17
.20 .18 .17
.16
Recessed Downlighting
®
3 3/4" Aperture Deep Downlight Reflector Trim
Candlepower Curve
Report 1267FR
Efficiency = 36.0%
Job Information
Lightolier
a Genlyte company
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.
© 2006 Genlyte Group LLC • H0906
Type:
www.lightolier.com
2045
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