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   Prudential Lighting  Surface & Suspended  

Surface & Suspended - Page 11

 

 

PHOTOMETRIC DATA

P-1221-04RS-WA

COEFFICIENTS OF UTILIZATION
% CEILING REFLECTANCE 80 50 10
% WALL REFLECTANCE 50 30 10 50 30 10 50 30 10
ROOM CAVITY RATIO FLOOR CAVITY REFLECTANCE, 20%
1 .67 .64 .59 .57 .54 .52 .44 .43 .41
2 .57 .52 .47 .48 .44 .40 .37 .35 .32
3 .49 .43 .37 .41 .36 .32 .32 .29 .26
4 .43 .36 .31 .36 .31 .28 .29 .25 .23
5 .37 .30 .26 .31 .27 .23 .25 .21 .18
6 .34 .27 .22 .28 .23 .20 .22 .18 .16
7 .30 .24 .19 .26 .21 .17 .21 .17 .14
8 .28 .21 .16 .23 .18 .14 .19 .15 .12
9 .25 .18 .14 .21 .16 .12 .17 .13 .10
10 .22 .16 .12 .19 .14 .11 .15 .11 .09

P-1222-04RS-WA

COEFFICIENTS OF UTILIZATION
80 50 10
50 30 10 50 30 10 50 30 10
FLOOR CAVITY REFLECTANCE, 20%
.58 .55 .52 .51 .49 .47 .42 .41 .40
.50 .45 .42 .44 .40 .37 .36 .34 .32
.43 .38 .34 .38 .34 .31 .32 .29 .27
.38 .32 .28 .33 .29 .26 .28 .25 .23
.34 .28 .24 .30 .25 .22 .25 .22 .19
.30 .25 .21 .27 .22 .19 .22 .19 .17
.27 .22 .18 .24 .20 .17 .20 .17 .15
.25 .19 .16 .22 .18 .15 .19 .15 .13
.22 .17 .14 .20 .16 .13 .17 .14 .12
.20 .16 .13 .18 .14 .12 .16 .13 .10

SERVICING

Patent No. 3525544

INSTALLATION

PRUDENTIAL LIGHTING 1774 E. 21st ST. LOS ANGELES, CA 90058 213.746.0360 FAX: 213.746.8838
 

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