Lightolier 7794QD - Manual (Page 2)

Calculite ®
Incandescent
Lensed Downlight
Coefficients of Utilization
% Effective ceiling cavity reflectance
80 70 50 30 10 0
Room cavity ratio
20% Floor cavity reflectance
50 30 10 50 30 10 50 30 10 50 30 10 50 30 10 0
.64 .62 .61 .62 .61 .60 .60 .59 .58 .58 .57 .56 .56 .55 .54 .53
.60 .57 .55 .59 .56 .54 .57 .355 .53 .55 .53 .52 .53 .52 .51 .50
.56 .53 .51 .55 .52 .50 .54 .51 .50 .52 .50 .49 .51 .49 .48 .47
.52 .49 .47 .51 .49 .46 .50 .48 .46 .49 .47 .45 .48 .46 .45 .44
.49 .46 .43 .49 .45 .43 .48 .45 .43 .47 .44 .42 .46 .44 .42 .41
.46 .43 .40 .46 .43 .40 .45 .42 .40 .45 .42 .40 .43 .41 .39 .39
.43 .40 .38 .43 .40 .38 .42 .39 .37 .42 .39 .37 .41 .39 .37 .36
.41 .37 .35 .40 .37 .35 .40 .37 .35 .39 .36 .34 .39 .36 .34 .34
.38 .35 .32 .38 .35 .32 .37 .34 .32 .37 .34 .32 .36 .34 .32 .31
.34 .30 .28 .34 .30 .28 .33 .30 .28 .33 .30 .28 .32 .30 .28 .27
1
2
3
4
5
6
7
8
9
10
% Wall reflectance
Conversion Factor:
Conversion Factors:
Use quick calculator chart to determine spacing of luminaires for desired level of illumination.
80% Ceiling; 50% Walls; 20% Floor
Room Surface Reflectances:
100 Watt A-19
1750 Lumens Per Lamp
RCR = 10 (Rm. Width - Mtg. Ht. above work plane)
RCR = 5 (Rm. Width - 2Mtg. Ht. above work plane)
RCR = 1 (Rm. Width - 10 x Mtg. Ht. above work plane)
CENTER TO CENTER DISTANCE OF FIXTURES IN FEET
AREA PER FIXTURE IN SQUARE FEET
INITIAL FOOTCANDLES
10 11 12 13 14 15 9 8 7 6 5 4 3
25 50 75 100 125 150 175 200 225
40
35
30
25
20
15
10
5
150
300
90
60
30
450
600
Spacing Ratio = 1.1
ETL, Inc. Report No. 387916-A
Date: 08-12-63
Efficiency: 55.5%
Candlepower Summary
DEG CP ZONAL FLUX
0 697
5 686 65
15 654 185
25 634 294
35 393 247
45 140 108
55 53.4 48
65 26.3 26
75 8.8 9
85 2.6 3
90 0
ZONE LUMENS %
0-30 544 32.0
0-40 791 44.5
0-60 947 55.5
0-90 985 58.0
Calculite ® Incandescent Lensed Downlight
7794QD
Page 2 of 2 7 3/8” Aperture Horizontal Lamp Fresnel Lenslite
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: