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Table 2 Lighting effect at different vector/scalar ratio

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

Vector/Scalar ratio

Flow of light (Dimensionality)

Appearance

3.5

Dramatic

Theatrical

3.0

Very strong

Strong contrast, details not discernable

2.5

Strong

Suitable for display, too harsh for faces

2.0

Moderately strong

Pleasant for distant face

1.5

Moderately weak

Pleasant for near faces

1.0

Weak

Soft lighting for subdued effects

.5

Very weak

Flat, shadow free lighting