Effect of Lighting Supplementation on Daytime Cognition

The Effect of Lighting Supplementation on Cognitive Task Performance During the Day

The aim of the study is to examine the efficacy of supplementing sub-optimal ambient room lighting with a task lamp on working memory and procedural learning.

Inclusion Criteria:

• Aged between 18-30 years;
• Healthy (no medical, psychiatric or sleep disorders;
• Non-smoking for at least 6 months;
• Body Mass Index of >18 or <30 kg/m2;
• Able to maintain 7-hour consistent sleep schedule during the study
• Able to refrain from caffeine, alcohol, medication and supplements during the study

Exclusion Criteria:

• History of alcohol or substance abuse;
• positive result on drugs of abuse urine toxicology;
• Current or past history of sleep disorders, including but not limited to obstructive sleep apnea, narcolepsy, insomnia, or any significant sleep complaint
• Psychiatric disorder, or first degree relative with a psychiatric disorder
• Recent acute or chronic medical disorder
• Use of drugs or medication (birth control OK) likely to affect sleep, alertness or light sensitivity, as determined by the investigators
• Visual disorder, including but not limited to color blindness, or family history of glaucoma
• Pregnancy or lactation
• Shift work (> 2 nights / week in the last 3 months and not during the study)
• Transmeridian travel (2 or more time zones) in the past 3 months
• Any other reason as determine by the Principal Investigator