architecture - engineering - construction
Prudential Lighting
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PHOTOMETRIC DATA
P-8948-04RS-WA (4' Dia. 8-Lamp)
| COEFFICIENTS OF UTILIZATION |
| % CEILING REFLECTANCE |
80 |
50 |
| % WALL REFLECTANCE |
50 |
30 |
10 |
50 |
30 |
10 |
| ROOM CAVITY RATIO |
FLOOR CAVITY REFLECTANCE, 20% |
| 1 |
.50 |
.48 |
.47 |
.47 |
.46 |
.44 |
| 2 |
.44 |
.41 |
.38 |
.42 |
.39 |
.38 |
| 3 |
.39 |
.35 |
.32 |
.37 |
.34 |
.32 |
| 4 |
.35 |
.31 |
.28 |
.33 |
.30 |
.28 |
| 5 |
.31 |
.27 |
.23 |
.29 |
.26 |
.23 |
| 6 |
.28 |
.24 |
.21 |
.26 |
.23 |
.20 |
| 7 |
.25 |
.20 |
.18 |
.24 |
.20 |
.18 |
| 8 |
.22 |
.18 |
.16 |
.21 |
.18 |
.15 |
| 9 |
.20 |
.16 |
.13 |
.19 |
.15 |
.13 |
| 10 |
.18 |
.14 |
.11 |
.17 |
.14 |
.11 |
CEILING SYSTEMS (Specify Mounting Style)
 |
 |
| X-1 (Exposed T-bar) |
X-2C (Plaster) |
 |
 |
| X-3C (Wood Joist) |
X-4C ("C" Channel) |
X-5 (Concealed T-bar)
The above mounting styles shown the trim details for the
ceiling systems indicated. Mounting accessories and ceiling details are shown on pages
| INSTALLATION 
We reserve the right to change details of design, materials
or finish in any way that will not alter appearance, reduce function or performance.
 |
1774 E. 21st ST. LOS ANGELES, CA 90058
213.746.0360 Fax: 213.746. |
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