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A unit of scotopic illuminance, approximately 3.183 10 × 10⁻⁴ candela per square meter. Symbol, sk.
Scotopic light levels are very low: those perceived by the dark-adapted eye, that is, by the retina's rods and not the cones.
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Copyright © 2000 Sizes, Inc. All rights reserved.
Last revised: 23 January 2002.