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Journal of Solid State Lighting

Table 3 Detail data on computations of illumination, contrast ratio and vector/scalar ratios for task surface illumination of 400 Lux

From: Evaluations of Low ambient task - surround lighting system in a simulated environment

 

Center location point

Side location point

Scenario 1

Ambient 400 Surround 0 Task 0

 
 

E (x)

227

E (−x)

220

ʽE(x)

7

~E(X)

220

E (x)

245

E (−x)

139

ʽE(x)

106

~E(x)

139

 

E (y)

212

E (−y)

227

ʽEy)

−15

~E(Y)

212

E (y)

196

E (−y)

207

ʽE(y)

−11

~E(y)

196

 

E (z)

476

E (−z)

128

ʽE(z)

348

~E(Z)

128

E (z)

445

E (−z)

104

ʽE(z)

341

~E(z)

104

 

Vector (Mag)

348

E (Vert)

227

    

Vector (Mag)

357

E (Vert)

245

    
 

Scalar

274

E(Horz)

400

    

Scalar

236

E(Horz)

400

    
 

V/S

0.12

CR

5.5

    

V/S

1.28

CR

4.88

    

Scenario 2

Ambient 100 Surround 0 Task 300

 
 

E (x)

73

E (−x)

70

ʽE(x)

3

~E(X)

70

E (x)

82

E (−x)

39

ʽE(x)

43

~E(x)

39

 

E (y)

70

E (−y)

71

ʽE(y)

−1

~E(Y)

70

E (y)

54

E (−y)

57

ʽE(y)

−3

~E(y)

54

 

E (z)

120

E (−z)

110

ʽE(z)

10

~E(Z)

110

E (z)

113

E (−z)

41

ʽE(z)

72

~E(z)

41

 

Vector (Mag)

10

E (Vert)

73

    

Vector (Mag)

84

E (Vert)

82

    
 

Scalar

86

E(Horz)

400

    

Scalar

66

E(Horz)

400

    
 

V/S

0.12

CR

5.5

    

V/S

1.28

CR

4.88

    

Scenario 3

Ambient 100 Surround 100 Task 200

 
 

E (x)

118

E (−x)

112

ʽE (x)

6

~E(x)

112

E (x)

146

E (−x)

51

ʽE(x)

95

~E(x)

51

 

E (y)

118

E (−y)

115

ʽE(y)

3

~E(y)

115

E (y)

70

E (−y)

73

ʽEy)

−3

~E(y)

70

 

E (z)

453

E (−z)

115

ʽE(z)

338

~E(z)

115

E (z)

163

E (−z)

49

ʽE(z)

114

~E(z)

49

 

Vector (Mag)

338

E (Vert)

118

    

Vector (Mag)

148

E (Vert)

146

    
 

Scalar

199

E(Horz)

400

    

Scalar

94

E(Horz)

400

    
 

V/S

1.70

CR

3.39

    

V/S

1.58

CR

2.74

    

Scenario 4

Ambient 100 Surround 150 Task 150

 
 

E (x)

142

E (−x)

132

ʽE(x)

10

~E(X)

132

E (x)

178

E (−x)

56

ʽE(x)

122

~E(x)

56

 

E (y)

143

E (−y)

137

ʽEy)

6

~E(Y)

137

E (y)

75

E (−y)

78

ʽEy)

−3

~E(y)

75

 

E (z)

632

E (−z)

115

ʽE(z)

517

~E(Z)

115

E (z)

184

E (−z)

52

ʽE(z)

132

~E(z)

52

 

Vector (Mag)

517

E (Vert)

142

    

Vector (Mag)

180

E (Vert)

178

    
 

Scalar

257

E(Horz)

400

    

Scalar

106

E(Horz)

400

    
 

V/S

2.01

CR

2.82

    

V/S

1.70

CR

2.25

    

Scenario 5

Ambient 100 Surround 200 Task 100

 
 

E (x)

172

E (−x)

158

ʽE(x)

14

~E(X)

158

E (x)

219

E (−x)

62

ʽE(x)

157

~E(x)

62

 

E (y)

174

E (−y)

165

ʽEy)

9

~E(Y)

165

E (y)

83

E (−y)

86

ʽEy)

−3

~E(y)

83

 

E (z)

856

E (−z)

118

ʽE(z)

738

~E(Z)

118

E (z)

210

E (−z)

58

ʽE(z)

152

~E(z)

58

 

Vector (Mag)

738

E (Vert)

172

    

Vector (Mag)

219

E (Vert)

219

    
 

Scalar

332

E(Horz)

400

    

Scalar

122

E(Horz)

400

    
 

V/S

2.23

CR

2.33

    

V/S

1.79

CR

1.83

    

scenario 6

Ambient 100 Surround 300 Task 0

 
 

E (x)

228

E (−x)

206

ʽE(x)

22

~E(X)

206

E (x)

293

E (−x)

73

ʽE(x)

220

~E(x)

73

 

E (y)

230

E (−y)

218

ʽEy)

12

~E(Y)

218

E (y)

97

E (−y)

100

ʽEy)

−3

~E(y)

97

 

E (z)

1273

E (−z)

112

ʽE(z)

1161

~E(Z)

112

E (z)

258

E (−z)

68

ʽE(z)

190

~E(z)

68

 

Vector (Mag)

1161

E (Vert)

228

    

Vector (Mag)

291

E (Vert)

293

    
 

Scalar

469

E(Horz)

400

    

Scalar

152

E(Horz)

400

    
 

V/S

2.48

CR

1.75

    

V/S

1.91

CR

1.37

    
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