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We examined the impact of an 8-h exposure to short-wavelength-enriched white light during the day on the cognitive performance, alertness, and mood of moderately sleep-restricted university students in a simulated classroom setting. A total of 28 participants (mean age: 23.57 ± 2.69; 19 female) were assigned to one of two short-wavelength-enriched white light conditions, each with an equal melanopic daylight efficacy ratio (melDER∼0.9). However, they differed in photopic and melanopic illuminances, falling within the upper and lower limits of prescribed standards for classroom lighting: low illuminance (LI; 309.33 ± 3.04 horizontal photopic and 128.26 ± 7.37 vertical melanopic EDI lux) and high illuminance (HI; 513 ± 12.59 horizontal photopic and 213.70 ± 11.62 vertical melanopic EDI lux). Cognitive performance, procedural memory, declarative memory, subjective alertness, and mood were evaluated using …