Pupils and students thed to be late chronotypes Reduced cognitive performance in early morning hours Tendecy to sleep during first hours of school Effects are even strengthened by low illumination levels in schools(300 lx Missingexposure to daylight Disadvantage for pupils sitting farther away from windows Bionlogically optimized liht is able to improve cognitive functions Biologcally optimized light is able to stabilize circadian rhythms to school time
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