Figure 1From: Low-intensity blue-enriched white light (750 lux) and standard bright light (10 000 lux) are equally effective in treating SAD. A randomized controlled study Spectral-power distributions of the lamps used in the standard EnergyLight ® (5000°K) and the specially-prepared EnergyLight ® with blue-enriched white light (17 000°K).Back to article page