|
|
Tables > Lighting > Cavity Ratios > Cavity Dimensions
Ceiling or Room Cavity Depth
|
| Room Dimensions |
Ceiling or Room Cavity Depth |
| Width |
Length |
1.0 |
1.5 |
2.0 |
2.5 |
3.0 |
3.5 |
4.0 |
5.0 |
6.0 |
7.0 |
8 |
9 |
10 |
11 |
12 |
14 |
16 |
20 |
25 |
30 |
| 8 | 8 | 1.2 | 1.9 | 2.5 | 3.1 | 3.7 | 4.4 | 5 | 6.2 | 7.5 | 8.8 | 10 | 11.2 | 12.5 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | | 8 | 10 | 1.1 | 1.7 | 2.2 | 2.8 | 3.4 | 3.9 | 4.5 | 5.6 | 6.7 | 7.9 | 9 | 10.1 | 11.3 | 12.4 | 0 | 0 | 0 | 0 | 0 | 0 | | 8 | 14 | 1 | 1.5 | 2 | 2.5 | 3 | 3.4 | 3.9 | 4.9 | 5.9 | 6.9 | 7.8 | 8.8 | 9.7 | 10.7 | 11.7 | 0 | 0 | 0 | 0 | 0 | | 8 | 20 | .9 | 1.3 | 1.7 | 2.2 | 2.6 | 3.1 | 3.5 | 4.4 | 5.2 | 6.1 | 7 | 7.9 | 8.8 | 9.6 | 10.5 | 12.2 | 0 | 0 | 0 | 0 | | 8 | 30 | .8 | 1.2 | 1.6 | 2 | 2.4 | 2.8 | 3.2 | 4 | 4.7 | 5.5 | 6.3 | 7.1 | 7.9 | 8.7 | 9.5 | 11 | 0 | 0 | 0 | 0 | | 8 | 40 | .7 | 1.1 | 1.5 | 1.9 | 2.3 | 2.6 | 3 | 3.7 | 4.5 | 5.3 | 5.9 | 6.5 | 7.4 | 8.1 | 8.8 | 10.3 | 11.8 | 0 | 0 | 0 | | 10 | 10 | 1 | 1.5 | 2 | 2.5 | 3 | 3.5 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 0 | 0 | 0 | 0 | 0 | | 10 | 14 | .9 | 1.3 | 1.7 | 2.1 | 2.6 | 3 | 3.4 | 4.3 | 5.1 | 6 | 6.9 | 7.8 | 8.6 | 9.5 | 10.4 | 12 | 0 | 0 | 0 | 0 | | 10 | 20 | .7 | 1.1 | 1.5 | 1.9 | 2.3 | 2.6 | 3 | 3.7 | 4.5 | 5.3 | 6 | 6.8 | 7.5 | 8.3 | 9 | 10.5 | 12 | 0 | 0 | 0 | | 10 | 30 | .7 | 1 | 1.3 | 1.7 | 2 | 2.3 | 2.7 | 3.3 | 4 | 4.7 | 5.3 | 6 | 6.6 | 7.3 | 8 | 9.4 | 10.6 | 0 | 0 | 0 | | 10 | 40 | .6 | .9 | 1.2 | 1.6 | 1.9 | 2.2 | 2.5 | 3.1 | 3.7 | 4.4 | 5 | 5.6 | 6.2 | 6.9 | 7.5 | 8.7 | 10 | 12.5 | 0 | 0 | | 10 | 60 | .6 | .9 | 1.2 | 1.5 | 1.7 | 2 | 2.3 | 2.9 | 3.5 | 4.1 | 4.7 | 5.3 | 5.9 | 6.5 | 7.1 | 8.2 | 9.4 | 11.7 | 0 | 0 | | 12 | 12 | .8 | 1.2 | 1.7 | 2.1 | 2.5 | 2.9 | 3.3 | 4.2 | 5 | 5.8 | 6.7 | 7.5 | 8.4 | 9.2 | 10 | 11.7 | 0 | 0 | 0 | 0 | | 12 | 16 | .7 | 1.1 | 1.5 | 1.8 | 2.2 | 2.5 | 2.9 | 3.6 | 4.4 | 5.1 | 5.8 | 6.5 | 7.2 | 8 | 8.7 | 10.2 | 11.6 | 0 | 0 | 0 | | 12 | 24 | .6 | .9 | 1.2 | 1.6 | 1.9 | 2.2 | 2.5 | 3.1 | 3.7 | 4.4 | 5 | 5.6 | 6.2 | 6.9 | 7.5 | 8.7 | 10 | 12.5 | 0 | 0 | | 12 | 36 | .6 | .8 | 1.1 | 1.4 | 1.7 | 1.9 | 2.2 | 2.8 | 3.3 | 3.9 | 4.4 | 5 | 5.5 | 6 | 6.6 | 7.8 | 8.8 | 11 | 0 | 0 | | 12 | 50 | .5 | .8 | 1 | 1.3 | 1.5 | 1.8 | 2.1 | 2.6 | 3.1 | 3.6 | 4.1 | 4.6 | 5.1 | 5.6 | 6.2 | 7.2 | 8.2 | 10.2 | 0 | 0 | | 12 | 70 | .5 | .7 | 1 | 1.2 | 1.5 | 1.7 | 2 | 2.4 | 2.9 | 3.4 | 3.9 | 4.4 | 4.9 | 5.4 | 5.8 | 6.8 | 7.8 | 9.7 | 12.2 | 0 | | 14 | 14 | .7 | 1.1 | 1.4 | 1.8 | 2.1 | 2.5 | 2.9 | 3.6 | 4.3 | 5 | 5.7 | 6.4 | 7.1 | 7.8 | 8.5 | 10 | 11.4 | 0 | 0 | 0 | | 14 | 20 | .6 | .9 | 1.2 | 1.5 | 1.8 | 2.1 | 2.4 | 3 | 3.6 | 4.2 | 4.9 | 5.5 | 6.1 | 6.7 | 7.3 | 8.6 | 9.8 | 12.3 | 0 | 0 | | 14 | 30 | .5 | .8 | 1 | 1.3 | 1.6 | 1.8 | 2.1 | 2.6 | 3.1 | 3.7 | 4.2 | 4.7 | 5.2 | 5.8 | 6.3 | 7.3 | 8.4 | 10.5 | 0 | 0 | | 14 | 42 | .5 | .7 | 1 | 1.2 | 1.4 | 1.7 | 1.9 | 2.4 | 2.9 | 3.3 | 3.8 | 4.3 | 4.7 | 5.2 | 5.7 | 6.7 | 7.6 | 9.5 | 11.9 | 0 | | 14 | 60 | .4 | .7 | .9 | 1.1 | 1.3 | 1.5 | 1.8 | 2.2 | 2.6 | 3.1 | 3.5 | 3.9 | 4.4 | 4.8 | 5.2 | 6.1 | 7 | 8.8 | 10.9 | 0 | | 14 | 90 | .4 | .6 | .8 | 1 | 1.2 | 1.4 | 1.6 | 2 | 2.5 | 2.9 | 3.3 | 3.7 | 4.1 | 4.5 | 5 | 5.8 | 6.6 | 8.3 | 10.3 | 12.4 | | 17 | 17 | .6 | .9 | 1.2 | 1.5 | 1.8 | 2.1 | 2.3 | 2.9 | 3.5 | 4.1 | 4.7 | 5.3 | 5.9 | 6.5 | 7 | 8.2 | 9.4 | 11.7 | 0 | 0 | | 17 | 25 | .5 | .7 | 1 | 1.2 | 1.5 | 1.7 | 2 | 2.5 | 3 | 3.5 | 4 | 4.5 | 5 | 5.5 | 6 | 7 | 8 | 10 | 12.5 | 0 | | 17 | 35 | .4 | .7 | .9 | 1.1 | 1.3 | 1.5 | 1.7 | 2.2 | 2.6 | 3.1 | 3.5 | 3.9 | 4.4 | 4.8 | 5.2 | 6.1 | 7 | 8.7 | 10.9 | 0 | | 17 | 50 | .4 | .6 | .8 | 1 | 1.2 | 1.4 | 1.6 | 2 | 2.4 | 2.8 | 3.1 | 3.5 | 3.9 | 4.3 | 4.5 | 5.4 | 6.2 | 7.7 | 9.7 | 11.6 | | 17 | 80 | .4 | .5 | .7 | .9 | 1.1 | 1.2 | 1.4 | 1.8 | 2.1 | 2.5 | 2.9 | 3.3 | 3.6 | 4 | 4.3 | 5.1 | 5.8 | 7.2 | 9 | 10.9 | | 17 | 120 | .3 | .5 | .7 | .8 | 1 | 1.2 | 1.3 | 1.7 | 2 | 2.3 | 2.7 | 3 | 3.4 | 3.7 | 4 | 4.7 | 5.4 | 6.7 | 8.4 | 10.1 | | 20 | 20 | .5 | .7 | 1 | 1.2 | 1.5 | 1.7 | 2 | 2.5 | 3 | 3.5 | 4 | 4.5 | 5 | 5.5 | 6 | 7 | 8 | 10 | 12.5 | 0 | | 20 | 30 | .4 | .6 | .8 | 1 | 1.2 | 1.5 | 1.7 | 2.1 | 2.5 | 2.9 | 3.3 | 3.7 | 4.1 | 4.5 | 4.9 | 5.8 | 6.6 | 8.2 | 10.3 | 12.4 | | 20 | 45 | .4 | .5 | .7 | .9 | 1.1 | 1.3 | 1.4 | 1.8 | 2.2 | 2.5 | 2.9 | 3.3 | 3.6 | 4 | 4.3 | 5.1 | 5.8 | 7.2 | 9.1 | 10.9 | | 20 | 60 | .3 | .5 | .7 | .8 | 1.2 | 1.2 | 1.3 | 1.7 | 2 | 2.3 | 2.7 | 3 | 3.4 | 3.7 | 4 | 4.7 | 5.4 | 6.7 | 8.4 | 10.1 | | 20 | 90 | .3 | .5 | .6 | .8 | .9 | 1.1 | 1.2 | 1.5 | 1.8 | 2.1 | 2.4 | 2.7 | 3 | 3.3 | 3.6 | 4.2 | 4.8 | 6 | 7.5 | 9 | | 20 | 150 | .3 | .4 | .6 | .7 | .8 | 1 | 1.1 | 1.4 | 1.7 | 2 | 2.3 | 2.6 | 2.9 | 3.2 | 3.4 | 4 | 4.6 | 5.7 | 7.2 | 8.6 | | 24 | 24 | .4 | .6 | .8 | 1 | 1.2 | 1.5 | 1.7 | 2.1 | 2.5 | 2.9 | 3.3 | 3.7 | 4.1 | 4.5 | 5 | 5.8 | 6.7 | 8.2 | 10.3 | 12.4 | | 24 | 32 | .4 | .5 | .7 | .9 | 1.1 | 1.3 | 1.5 | 1.8 | 2.2 | 2.6 | 2.9 | 3.3 | 3.6 | 4 | 4.3 | 5.1 | 5.8 | 7.2 | 9 | 11 | | 24 | 50 | .3 | .5 | .6 | .8 | .9 | 1.1 | 1.2 | 1.5 | 1.8 | 2.2 | 2.5 | 2.8 | 3.1 | 3.4 | 3.7 | 4.4 | 5 | 6.2 | 7.8 | 9.4 | | 24 | 70 | .3 | .4 | .6 | .7 | .8 | 1 | 1.1 | 1.4 | 1.7 | 2 | 2.2 | 2.5 | 2.8 | 3 | 3.3 | 3.8 | 4.4 | 5.5 | 6.9 | 8.2 | | 24 | 100 | .3 | .4 | .5 | .6 | .8 | .9 | 1 | 1.3 | 1.6 | 1.8 | 2.1 | 2.4 | 2.6 | 2.9 | 3.1 | 3.7 | 4.2 | 5.2 | 6.5 | 7.9 | | 24 | 160 | .2 | .4 | .5 | .6 | .7 | .8 | 1 | 1.2 | 1.4 | 1.7 | 1.9 | 2.1 | 2.4 | 2.6 | 2.8 | 3.3 | 3.8 | 4.7 | 5.9 | 7.1 | | 30 | 30 | .3 | .5 | .7 | .8 | 1 | 1.2 | 1.3 | 1.7 | 2 | 2.3 | 2.7 | 3 | 3.3 | 3.7 | 4 | 4.7 | 5.4 | 6.7 | 8.4 | 10 | | 30 | 45 | .3 | .4 | .6 | .7 | .8 | 1 | 1.1 | 1.4 | 1.7 | 1.9 | 2.2 | 2.5 | 2.7 | 3 | 3.3 | 3.8 | 4.4 | 5.5 | 6.9 | 8.2 | | 30 | 60 | .3 | .4 | .5 | .6 | .7 | .9 | 1 | 1.2 | 1.5 | 1.7 | 2 | 2.2 | 2.5 | 2.7 | 3 | 3.5 | 4 | 5 | 6.2 | 7.4 | | 30 | 90 | .2 | .3 | .4 | .6 | .7 | .8 | .9 | 1.1 | 1.3 | 1.6 | 1.8 | 2 | 2.2 | 2.5 | 2.7 | 3.1 | 3.6 | 4.5 | 5.6 | 6.7 | | 30 | 150 | .2 | .3 | .4 | .5 | .6 | .7 | .8 | 1 | 1.2 | 1.4 | 1.6 | 1.8 | 2 | 2.2 | 2.4 | 2.8 | 3.2 | 4 | 5 | 5.9 | | 30 | 200 | .2 | .3 | .4 | .5 | .6 | .7 | .8 | 1 | 1.1 | 1.3 | 1.5 | 1.7 | 1.9 | 2 | 2.2 | 2.6 | 3 | 3.7 | 4.7 | 5.6 | | 36 | 36 | .3 | .4 | .6 | .7 | .8 | 1 | 1.1 | 1.4 | 1.7 | 1.9 | 2.2 | 2.5 | 2.8 | 3 | 3.3 | 3.9 | 4.4 | 5.5 | 6.9 | 8.3 | | 36 | 50 | .2 | .4 | .5 | .6 | .7 | .8 | 1 | 1.2 | 1.4 | 1.7 | 1.9 | 2.1 | 2.5 | 2.6 | 2.9 | 3.3 | 3.8 | 4.8 | 5.9 | 7.2 | | 36 | 75 | .2 | .3 | .4 | .5 | .6 | .7 | .8 | 1 | 1.2 | 1.4 | 1.6 | 1.8 | 2 | 2.3 | 2.5 | 2.9 | 3.3 | 4.1 | 5.1 | 6.1 | | 36 | 100 | .2 | .3 | .4 | .5 | .6 | .7 | .8 | .9 | 1.1 | 1.3 | 1.5 | 1.7 | 1.9 | 2.1 | 2.3 | 2.6 | 3 | 3.8 | 4.7 | 5.7 | | 36 | 150 | .2 | .3 | .3 | .4 | .5 | .6 | .7 | .9 | 1 | 1.2 | 1.4 | 1.6 | 1.7 | 1.9 | 2.1 | 2.4 | 2.8 | 3.5 | 4.3 | 5.2 | | 36 | 200 | .2 | .2 | .3 | .4 | .5 | .6 | .7 | .8 | 1 | 1.1 | 1.3 | 1.5 | 1.6 | 1.8 | 2 | 2.3 | 2.6 | 3.3 | 4.1 | 4.9 | | 42 | 42 | .2 | .4 | .5 | .6 | .7 | .8 | 1 | 1.2 | 1.4 | 1.6 | 1.9 | 2.1 | 2.4 | 2.6 | 2.8 | 3.3 | 3.8 | 4.7 | 5.9 | 7.1 | | 42 | 60 | .2 | .3 | .4 | .5 | .6 | .7 | .8 | 1 | 1.2 | 1.4 | 1.6 | 1.8 | 2 | 2.2 | 2.4 | 2.8 | 3.2 | 4 | 5 | 6 | | 42 | 90 | .2 | .3 | .3 | .4 | .5 | .6 | .7 | .9 | 1 | 1.2 | 1.4 | 1.6 | 1.7 | 1.9 | 2.1 | 2.4 | 2.8 | 3.5 | 4.4 | 5.2 | | 42 | 140 | .2 | .2 | .3 | .4 | .5 | .5 | .6 | .8 | .9 | 1.1 | 1.2 | 1.4 | 1.5 | 1.7 | 1.9 | 2.2 | 2.5 | 3.1 | 3.9 | 4.6 | | 42 | 200 | .1 | .2 | .3 | .4 | .4 | .5 | .6 | .7 | .9 | 1 | 1.1 | 1.3 | 1.4 | 1.6 | 1.7 | 2 | 2.3 | 2.9 | 3.6 | 4.3 | | 42 | 300 | .1 | .2 | .3 | .3 | .4 | .5 | .5 | .7 | .8 | .9 | 1.1 | 1.3 | 1.4 | 1.5 | 1.7 | 1.9 | 2.2 | 2.8 | 3.5 | 4.2 | | 50 | 50 | .2 | .3 | .4 | .5 | .6 | .7 | .8 | 1 | 1.2 | 1.4 | 1.6 | 1.8 | 2 | 2.2 | 2.4 | 2.8 | 3.2 | 4 | 5 | 6 | | 50 | 70 | .2 | .3 | .3 | .4 | .5 | .6 | .7 | .9 | 1 | 1.2 | 1.4 | 1.5 | 1.7 | 1.9 | 2 | 2.4 | 2.7 | 3.4 | 4.3 | 5.1 | | 50 | 100 | .1 | .2 | .3 | .4 | .4 | .5 | .6 | .7 | .9 | 1 | 1.2 | 1.3 | 1.5 | 1.6 | 1.8 | 2.1 | 2.4 | 3 | 3.7 | 4.5 | | 50 | 150 | .1 | .2 | .3 | .3 | .4 | .5 | .5 | .7 | .8 | .9 | 1.1 | 1.2 | 1.3 | 1.5 | 1.6 | 1.9 | 2.1 | 2.7 | 3.3 | 4 | | 50 | 300 | .1 | .2 | .2 | .3 | .3 | .4 | .5 | .6 | .7 | .8 | .9 | 1 | 1.1 | 1.3 | 1.4 | 1.6 | 1.9 | 2.3 | 2.9 | 3.5 | | 60 | 60 | .2 | .2 | .3 | .4 | .5 | .6 | .7 | .8 | 1 | 1.2 | 1.3 | 1.5 | 1.7 | 1.8 | 2 | 2.3 | 2.7 | 3.3 | 4.2 | 5 | | 60 | 100 | .1 | .2 | .3 | .3 | .4 | .5 | .5 | .7 | .8 | .9 | 1.1 | 1.2 | 1.3 | 1.5 | 1.6 | 1.9 | 2.1 | 2.7 | 3.3 | 4 | | 60 | 150 | .1 | .2 | .2 | .3 | .3 | .4 | .5 | .6 | .7 | .8 | .9 | 1 | 1.2 | 1.3 | 1.4 | 1.6 | 1.9 | 2.3 | 2.9 | 3.5 | | 60 | 300 | .1 | .1 | .2 | .2 | .3 | .3 | .4 | .5 | .6 | .7 | .8 | .9 | 1 | 1.1 | 1.2 | 1.4 | 1.6 | 2 | 2.5 | 3 | | 75 | 75 | .1 | .2 | .3 | .3 | .4 | .5 | .5 | .7 | .8 | .9 | 1.1 | 1.2 | 1.3 | 1.5 | 1.6 | 1.9 | 2.1 | 2.7 | 3.3 | 4 | | 75 | 120 | .1 | .2 | .2 | .3 | .3 | .4 | .4 | .5 | .6 | .8 | .9 | 1 | 1.1 | 1.2 | 1.3 | 1.5 | 1.7 | 2.2 | 2.7 | 3.3 | | 75 | 200 | .1 | .1 | .2 | .2 | .3 | .3 | .4 | .5 | .5 | .6 | .7 | .8 | .9 | 1 | 1.1 | 1.3 | 1.5 | 1.8 | 2.3 | 2.7 | | 75 | 300 | .1 | .1 | .2 | .2 | .2 | .3 | .3 | .4 | .5 | .6 | .7 | .7 | .8 | .9 | 1 | 1.2 | 1.3 | 1.7 | 2.1 | 2.5 | | 100 | 100 | .1 | .1 | .2 | .2 | .3 | .3 | .4 | .5 | .6 | .7 | .8 | .9 | 1 | 1.1 | 1.2 | 1.4 | 1.6 | 2 | 2.5 | 3 | | 100 | 200 | .1 | .1 | .1 | .2 | .2 | .3 | .3 | .4 | .4 | .5 | .6 | .7 | .7 | .8 | .9 | 1 | 1.2 | 1.5 | 1.9 | 2.2 | | 100 | 300 | .1 | .1 | .1 | .2 | .2 | .2 | .3 | .3 | .4 | .5 | .5 | .6 | .7 | .7 | .8 | .9 | 1.1 | 1.3 | 1.7 | 2 | | 150 | 150 | .1 | .1 | .1 | .2 | .2 | .2 | .3 | .3 | .4 | .5 | .5 | .6 | .7 | .7 | .8 | .9 | 1.1 | 1.3 | 1.7 | 2 | | 150 | 300 | 0 | .1 | .1 | .1 | .1 | .2 | .2 | .2 | .3 | .3 | .4 | .5 | .5 | .6 | .6 | .7 | .8 | 1 | 1.2 | 1.5 | | 200 | 200 | 0 | .1 | .1 | .1 | .1 | .2 | .2 | .2 | .3 | .3 | .4 | .5 | .5 | .6 | .6 | .7 | .8 | 1 | 1.2 | 1.5 | | 200 | 300 | 0 | .1 | .1 | .1 | .1 | .1 | .2 | .2 | .2 | .3 | .3 | .4 | .4 | .5 | .5 | .6 | .7 | .8 | 1 | 1.2 | | 300 | 300 | 0 | 0 | .1 | .1 | .1 | .1 | .1 | .2 | .2 | .2 | .3 | .3 | .3 | .4 | .4 | .5 | .5 | .6 | .7 | .8 | | 500 | 500 | 0 | 0 | 0 | 0 | .1 | .1 | .1 | .1 | .1 | .1 | .2 | .2 | .2 | .2 | .2 | .3 | .3 | .4 | .5 | .6 |
|
Copyright 1995 Cooper Industries, Inc. | |
|
Cables
