Tables > Lighting > Ceiling Reflectance > Reflectance Values
Effective Ceiling Reflectance
|
| |
| % Ceiling or Floor Reflectance |
| 90 |
80 |
70 |
50 |
30 |
10 |
| % Wall Reflectance |
| 90 |
70 |
50 |
30 |
80 |
70 |
50 |
30 |
70 |
50 |
30 |
70 |
50 |
30 |
65 |
50 |
30 |
10 |
50 |
30 |
10 |
| Ceiling or Floor Cavity Ratio |
| 0 | 90 | 90 | 90 | 90 | 80 | 80 | 80 | 80 | 70 | 70 | 70 | 50 | 50 | 50 | 30 | 30 | 30 | 30 | 10 | 10 | 10 | | .1 | 90 | 89 | 88 | 87 | 79 | 79 | 78 | 78 | 69 | 69 | 68 | 59 | 49 | 48 | 30 | 30 | 29 | 29 | 10 | 10 | 10 | | .2 | 89 | 88 | 86 | 85 | 79 | 78 | 77 | 76 | 68 | 67 | 66 | 49 | 48 | 47 | 30 | 29 | 29 | 28 | 10 | 10 | 9 | | .3 | 89 | 87 | 85 | 83 | 78 | 77 | 75 | 74 | 68 | 66 | 64 | 49 | 47 | 46 | 30 | 29 | 28 | 27 | 10 | 10 | 9 | | .4 | 88 | 86 | 83 | 81 | 78 | 76 | 74 | 72 | 67 | 65 | 63 | 48 | 46 | 45 | 30 | 29 | 27 | 26 | 11 | 10 | 9 | | .5 | 88 | 85 | 81 | 78 | 77 | 75 | 73 | 70 | 66 | 64 | 61 | 48 | 46 | 44 | 29 | 28 | 27 | 25 | 11 | 10 | 9 | | .6 | 88 | 84 | 80 | 76 | 77 | 75 | 71 | 68 | 65 | 62 | 59 | 47 | 45 | 43 | 29 | `28 | 26 | 25 | 11 | 10 | 9 | | .7 | 88 | 83 | 78 | 74 | 76 | 74 | 70 | 66 | 65 | 61 | 58 | 47 | 44 | 42 | 29 | 28 | 26 | 24 | 11 | 10 | 8 | | .8 | 87 | 82 | 77 | 73 | 75 | 73 | 69 | 65 | 64 | 60 | 56 | 47 | 43 | 41 | 29 | 27 | 25 | 23 | 11 | 10 | 8 | | .9 | 87 | 81 | 76 | 71 | 75 | 72 | 68 | 63 | 63 | 59 | 55 | 46 | 43 | 40 | 29 | 27 | 25 | 22 | 11 | 9 | 8 | | 1 | 86 | 80 | 74 | 69 | 74 | 71 | 66 | 61 | 63 | 58 | 53 | 46 | 42 | 39 | 29 | 27 | 24 | 22 | 11 | 9 | 8 | | 1.1 | 86 | 79 | 73 | 67 | 74 | 71 | 65 | 60 | 62 | 57 | 52 | 46 | 41 | 38 | 29 | 26 | 24 | 21 | 11 | 9 | 8 | | 1.2 | 86 | 78 | 72 | 65 | 73 | 70 | 64 | 58 | 61 | 56 | 50 | 45 | 41 | 37 | 29 | 26 | 23 | 20 | 12 | 9 | 7 | | 1.3 | 85 | 78 | 70 | 64 | 73 | 69 | 63 | 57 | 61 | 55 | 49 | 45 | 40 | 36 | 29 | 26 | 23 | 20 | 12 | 9 | 7 | | 1.4 | 85 | 77 | 69 | 62 | 72 | 68 | 62 | 55 | 60 | 54 | 48 | 45 | 40 | 35 | 28 | 26 | 22 | 19 | 12 | 9 | 7 | | 1.5 | 85 | 76 | 68 | 61 | 72 | 68 | 61 | 54 | 59 | 53 | 47 | 44 | 39 | 34 | 28 | 25 | 22 | 18 | 12 | 9 | 7 | | 1.6 | 85 | 75 | 66 | 59 | 71 | 67 | 60 | 53 | 59 | 52 | 45 | 44 | 39 | 33 | 28 | 25 | 21 | 18 | 12 | 9 | 7 | | 1.7 | 84 | 74 | 65 | 58 | 71 | 66 | 59 | 52 | 58 | 51 | 44 | 44 | 38 | 32 | 28 | 25 | 21 | 17 | 12 | 9 | 7 | | 1.8 | 84 | 73 | 64 | 56 | 70 | 65 | 58 | 50 | 57 | 50 | 43 | 43 | 37 | 32 | 28 | 25 | 21 | 17 | 12 | 9 | 6 | | 1.9 | 84 | 73 | 63 | 55 | 70 | 65 | 57 | 49 | 57 | 49 | 42 | 43 | 37 | 31 | 28 | 25 | 20 | 16 | 12 | 9 | 6 | | 2 | 83 | 72 | 62 | 53 | 69 | 64 | 56 | 48 | 56 | 48 | 41 | 43 | 37 | 30 | 28 | 24 | 20 | 16 | 12 | 9 | 6 | | 2.1 | 83 | 71 | 61 | 52 | 69 | 63 | 55 | 47 | 56 | 47 | 40 | 43 | 36 | 29 | 28 | 24 | 20 | 16 | 13 | 9 | 6 | | 2.2 | 83 | 70 | 60 | 51 | 68 | 63 | 54 | 45 | 55 | 46 | 39 | 42 | 36 | 29 | 28 | 24 | 19 | 15 | 13 | 9 | 6 | | 2.3 | 83 | 69 | 59 | 50 | 68 | 62 | 53 | 44 | 54 | 46 | 38 | 42 | 35 | 28 | 28 | 24 | 19 | 15 | 13 | 9 | 6 | | 2.4 | 82 | 68 | 58 | 48 | 67 | 61 | 52 | 43 | 54 | 45 | 37 | 42 | 35 | 27 | 28 | 24 | 19 | 14 | 13 | 9 | 6 | | 2.5 | 82 | 68 | 57 | 47 | 67 | 61 | 51 | 42 | 53 | 44 | 36 | 41 | 34 | 27 | 27 | 23 | 18 | 14 | 13 | 9 | 6 | | 2.6 | 82 | 67 | 56 | 46 | 66 | 60 | 50 | 41 | 53 | 43 | 35 | 41 | 34 | 26 | 27 | 23 | 18 | 13 | 13 | 9 | 5 | | 2.7 | 82 | 66 | 55 | 45 | 66 | 60 | 49 | 40 | 52 | 43 | 34 | 41 | 33 | 26 | 27 | 23 | 18 | 13 | 13 | 9 | 5 | | 2.8 | 81 | 66 | 54 | 44 | 66 | 59 | 48 | 39 | 52 | 42 | 33 | 41 | 33 | 25 | 27 | 23 | 18 | 13 | 13 | 9 | 5 | | 2.9 | 81 | 65 | 53 | 43 | 65 | 58 | 48 | 38 | 51 | 41 | 33 | 40 | 33 | 25 | 27 | 23 | 17 | 12 | 13 | 9 | 5 | | 3 | 81 | 64 | 52 | 42 | 65 | 58 | 47 | 38 | 51 | 40 | 32 | 40 | 32 | 24 | 27 | 22 | 17 | 12 | 13 | 8 | 5 | | 3.1 | 80 | 64 | 51 | 41 | 64 | 57 | 46 | 37 | 50 | 40 | 31 | 40 | 32 | 24 | 27 | 22 | 17 | 12 | 13 | 8 | 5 | | 3.2 | 80 | 63 | 50 | 40 | 64 | 57 | 45 | 36 | 50 | 39 | 30 | 40 | 31 | 23 | 27 | 22 | 16 | 11 | 13 | 8 | 5 | | 3.3 | 80 | 62 | 49 | 39 | 64 | 56 | 44 | 35 | 49 | 39 | 30 | 39 | 31 | 23 | 27 | 22 | 16 | 11 | 13 | 8 | 5 | | 3.4 | 80 | 62 | 48 | 38 | 63 | 56 | 44 | 34 | 49 | 38 | 29 | 39 | 31 | 22 | 27 | 22 | 16 | 11 | 13 | 8 | 5 | | 3.5 | 79 | 61 | 48 | 37 | 63 | 55 | 43 | 33 | 48 | 38 | 29 | 39 | 30 | 22 | 26 | 22 | 16 | 11 | 13 | 8 | 5 | | 3.6 | 79 | 60 | 47 | 36 | 62 | 54 | 42 | 33 | 48 | 37 | 28 | 39 | 30 | 21 | 26 | 21 | 15 | 10 | 13 | 8 | 5 | | 3.7 | 79 | 60 | 46 | 35 | 62 | 54 | 42 | 32 | 48 | 37 | 27 | 38 | 30 | 21 | 26 | 21 | 15 | 10 | 13 | 8 | 4 | | 3.8 | 79 | 59 | 45 | 35 | 62 | 53 | 41 | 31 | 47 | 36 | 27 | 38 | 29 | 21 | 26 | 21 | 15 | 10 | 13 | 8 | 4 | | 3.9 | 78 | 59 | 45 | 34 | 61 | 53 | 40 | 30 | 47 | 36 | 26 | 38 | 29 | 20 | 26 | 21 | 15 | 10 | 13 | 8 | 4 | | 4 | 78 | 58 | 44 | 33 | 61 | 52 | 40 | 30 | 46 | 35 | 26 | 38 | 29 | 20 | 26 | 21 | 15 | 9 | 13 | 8 | 4 | | 4.1 | 78 | 57 | 43 | 32 | 60 | 52 | 39 | 29 | 46 | 35 | 25 | 37 | 28 | 20 | 26 | 21 | 14 | 9 | 13 | 8 | 4 | | 4.2 | 78 | 57 | 43 | 32 | 60 | 51 | 39 | 29 | 46 | 34 | 25 | 37 | 28 | 19 | 26 | 20 | 14 | 9 | 13 | 8 | 4 | | 4.3 | 78 | 56 | 42 | 31 | 60 | 51 | 38 | 28 | 45 | 34 | 25 | 37 | 28 | 19 | 26 | 20 | 14 | 9 | 13 | 8 | 4 | | 4.4 | 77 | 56 | 41 | 30 | 59 | 51 | 38 | 28 | 45 | 34 | 24 | 37 | 27 | 19 | 26 | 20 | 14 | 8 | 13 | 8 | 4 | | 4.5 | 77 | 55 | 41 | 30 | 59 | 50 | 37 | 27 | 45 | 33 | 24 | 37 | 27 | 19 | 25 | 20 | 14 | 8 | 14 | 8 | 4 | | 4.6 | 77 | 55 | 40 | 29 | 59 | 50 | 37 | 26 | 44 | 33 | 24 | 36 | 27 | 18 | 25 | 20 | 14 | 8 | 14 | 8 | 4 | | 4.7 | 77 | 54 | 40 | 29 | 58 | 49 | 36 | 26 | 44 | 33 | 23 | 36 | 26 | 18 | 25 | 20 | 13 | 8 | 14 | 8 | 4 | | 4.8 | 76 | 54 | 39 | 28 | 58 | 49 | 36 | 25 | 44 | 32 | 23 | 36 | 26 | 18 | 25 | 19 | 13 | 8 | 14 | 8 | 4 | | 4.9 | 76 | 53 | 38 | 28 | 58 | 49 | 35 | 25 | 44 | 32 | 23 | 36 | 26 | 18 | 25 | 19 | 13 | 7 | 14 | 8 | 4 | | 5 | 76 | 53 | 38 | 27 | 57 | 48 | 35 | 25 | 43 | 32 | 22 | 36 | 26 | 17 | 25 | 19 | 13 | 7 | 14 | 8 | 4 |
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Copyright 1995 Cooper Industries, Inc. |
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