Lighting Data
Example: With clear Alzak
®
and 100W A-19 units, located 2’ from wall and 3’ on center,
(matching downlights 3’ on center), the illumination on the wall 3’ down from the ceiling
is 20 f.c. beneath and 18 f.c. between fixtures.
1 242224 201220 19 619
2 353535 262126 241224
3 292829 201820 181118
4 242424 161716 131113
5 191919 121312 910 9
6 151515 101010 7 9 7
7 121212 9 8 9 6 7 6
8 101010 7 7 7 5 5 5
9 898 666 555
Distance from Ceiling, Ft.
UNITS 2 FEET FROM WALL
2’ 3’
Footcandle values are averaged and rounded off and are based on a minimum of five units. For 100W BT15, multiply footcandles by 0.8
4’
1 545 424 424 414
2 151415 121012 11 711 11 411
3 161616 131113 11 811 11 611
4 141414 111011 9 8 9 9 6 9
5 121212 10 910 8 7 8 7 5 7
6 111111 898 777 656
7 10910 777 666 555
8 888 666 555 454
9 777 656 454 444
3’ 4’
5’
6’
Distance from Ceiling, Ft.
UNITS 3 FEET FROM WALL
COEFFICIENTS OF UTILIZATION
% Effective Ceiling Cavity Reflectance
80 70 50 30 10 0
0
.52
.49
.46
.43
.40
.37
.34
.32
.30
.28
Room Cavity Ratio
20% Floor Cavity Reflectance
50 30 10 50 30 10 50 30 10 50 30 10 50 30 10
1 .62 .61 .59 .61 .60 .59 .59 .58 .57 .57 .56 .55 .55 .54 .53
2 .58 .56 .54 .57 .55 .53 .55 .53 .52 .53 .52 .51 .52 .51 .50
3 .54 .51 .49 .53 .51 .49 .52 .50 .48 .50 .49 .47 .49 .48 .47
4 .51 .48 .45 .50 .47 .45 .49 .46 .45 .48 .46 .44 .47 .45 .44
5 .47 .44 .42 .47 .44 .42 .46 .43 .42 .45 .43 .41 .44 .42 .40
6 .45 .41 .39 .44 .41 39 .43 .41 .38 .42 .40 .38 .42 .40 .38
7 .42 .38 .36 .41 .38 .36 .40 .38 .36 .40 .37 .35 .39 .37 .35
8 .39 .36 .34 .39 .36 .33 .38 .35 .33 .38 .35 .33 .37 .35 .33
9 .37 .33 .31 .36 .33 .31 .36 .33 .31 .35 .33 .31 .35 .32 .31
10 .35 .31 .29 .34 .31 .29 .34 .31 .29 .33 .31 .29 .33 .30 .29
% WALL REFLECTANCE
Candlepower Curve
Downlight Spacing Ratio = 1.0
100W A19
Report 0840FR
Efficiency = 56.0%
Footcandles on Wall From Multiple Units - Clear Alzak
®
with 100W A19
Lighting Data
Down Wall
For 100W BT15, multiply CU. by 0.75
Calculite
®
Evolution Incandescent Open Wall Washer C4AW
Page 2 of 2 4 1/2” Aperture A19/MB19/BT15 Reflector Trim
Lightolier a Genlyte 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.
© 2005 Genlyte Group LLC • C0505
Job Information Type:
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