Exposure to room lighting or a lamp after waking, with intensity and spectrum varying by device.
What it is, why people use it, the evidence, and what to know before trying it.
Light reaching the eyes can influence circadian signals. Timing, brightness, spectrum and distance affect the exposure; an unspecified LED cannot be treated as a standardized bright-light intervention.
Evidence basis: Early or theoretical research
Morning light can be a timing cue, but an unmeasured lamp setup has no defined clinical dose. Evidence for a specific therapeutic light box cannot be assigned to any full-spectrum LED.
Confidence: weak
Situations where this practice may need modification or professional guidance.
Avoid glare and unsuitable ultraviolet lamps. People using light for a sleep or mood disorder need appropriate guidance, particularly with eye disease, light-sensitive medicines or bipolar disorder.
This review does not automatically apply to:
Public protocols that include Morning indoor light. Open one to see the full context and source.
Session and schedule patterns reported in public protocols; these are observations, not instructions. Private and hidden usage is excluded.