Appendix 6
Means and Standard Deviations of Ratings of Brightness, Conspicuity and Comfort, for all
Three Signal Colors at the Luminances Used.
Luminance |
Brightness |
Conspicuity |
Discomfort | ||||
Light source_________ |
(cd∕m2) |
Mean |
Standard |
Mean |
Standard |
Mean |
Standard |
LED - Red___________ |
13704 |
8.00 |
1.53 |
8.33 |
1.42 |
2.87 |
1.93 |
LED - Red |
8205 |
7.13 |
1.89 |
7.63 |
1.94 |
2.33 |
1.54 |
LED - Red |
5319 |
6.77 |
1.98 |
7.00 |
2.07 |
2.37 |
1.43 |
LED - Red |
3626 |
5.97 |
1.61 |
6.40 |
1.75 |
2.47 |
1.76 |
LED - Red |
2115 |
4.70 |
1.56 |
4.83 |
1.70 |
2.53 |
1.89 |
LED - Red___________ |
1049 |
3.00 |
1.20 |
3.17 |
1.42 |
3.17 |
2.73 |
Incandescent - Red |
5312 |
6.17 |
1.74 |
6.60 |
1.77 |
2.80 |
1.75 |
LED - Yellow |
22253 |
707 |
141 |
7.17 |
1.60 |
2.57 |
1.48 |
LED - Yellow |
16895 |
7.10 |
1.73 |
7.27 |
1.60 |
2.53 |
1.63 |
LED - Yellow |
13580 |
6.77 |
1.25 |
6.63 |
1.43 |
2.67 |
1.69 |
LED - Yellow |
8119 |
5.77 |
1.50 |
5.67 |
1.73 |
2.77 |
1.77 |
LED - Yellow |
5321 |
4.80 |
1.40 |
4.73 |
1.44 |
3.10 |
2.17 |
LED - Yellow_________ |
1068 |
2.07 |
0.78 |
1.97 |
0.96 |
3.47 |
3.52 |
Incandescent - Yellow |
22567 |
6.73 |
1.57 |
6.67 |
1.60 |
2.47 |
1.46 |
Incandescent - Green* |
11819 |
640 |
1.92 |
5.90 |
2.04 |
2.50 |
1.89 |
Incandescent - Green* |
9334 |
5.60 |
1.77 |
5.40 |
1.99 |
2.67 |
2.04 |
Incandescent - Green* |
7171 |
5.70 |
2.25 |
5.03 |
2.36 |
2.87 |
2.06 |
Incandescent - Green* |
6352 |
5.10 |
1.92 |
4.73 |
2.03 |
2.77 |
1.79 |
LED - Green |
4596 |
5.13 |
1.55 |
4.70 |
1.64 |
2.83 |
2.04 |
LED - Green |
1018 |
2.07 |
1.01 |
2.03 |
0.96 |
3.63 |
3.31 |
Incandescent - Green* |
9587 |
5.17 |
2.05 |
4.53 |
2.30 |
2.83 |
2.31 |
* Incandescent source filtered to provide similar color to green
A6-1
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