The name is absent



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
deviation

Mean

Standard
deviation

Mean

Standard
deviation

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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