Moffit 1993.

Methods	Allocation: randomized, 'sealed envelopes', 'block of 4', 'stratified on severity of depression'. Blinding: single blind, 'patients blind'. Duration: 10 days.
Participants	Diagnosis: Depression. RDC. Inclusion criteria: 50 years or older, needing care for medical and/or psychiatric conditions. Exclusion criteria: severe visual impairment, history of ocular photosensitivity, red‐green color blindness, organic aggressive syndrome, bipolar disorder, schizophrenia, MMSE 15 or less. N = 20. Age: mean 73.9 years. Sex: not known. Setting: nursing home patients.
Interventions	1. Bright light (2500 lux 10‐12 AM for 2 hours). N = 10. 2. Dim red light (50 lux 10‐12 AM for 2 hours). N = 10. Ddevice: Light box.
Outcomes	Mental state (GDS). Unable to use ‐ Cognitive function (MMSE ‐ no SD available).
Notes	Light only. Pharmacotherapy unchanged.
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment?	Low risk	A ‐ Adequate