Sleep Quality

• Red Light PBM (Including 630 nm) for Better Sleep
  
  This review suggests that photobiomodulation with red light around 630 nm applied at night can improve sleep by boosting brain function, clearing toxins like beta-amyloid during rest, and supporting overall well-being without invasive methods.

• 633 nm and 870 nm LED head treatment linked to better sleep after brain injury
  
  (633 nm - overlaps 630 nm) Eleven people with chronic mild traumatic brain injury received 18 sessions of red (633 nm) and near-infrared (870 nm) LED cluster-head treatment to the scalp over six weeks in an open-label pilot, with significant gains in attention and memory tests and participants reporting "improved sleep" and fewer PTSD symptoms; there was no placebo group.

• 630 nm red-light glasses improve reaction times in real shift workers
  
  In a 20-week field study of day- and night-shift healthcare workers, wearing personal light glasses giving 50 lux of 630 nm red light improved response times compared with dim light; blue (460 nm) light did the same and was the condition that reduced self-reported sleep disturbances, so the authors suggest red light as an alertness aid for shifts rather than a sleep treatment.

• 630 nm red LED light restores brain fluid flow in an Alzheimer's mouse model
  
  In APP/PS1 mice, 630 nm red LED light (chosen for its low heating and roughly 49% penetration to the brain) broke up amyloid-beta deposits, reopened obstructed interstitial-fluid flow and improved memory. Sleep was not measured; this is the mechanistic study behind the "lights at night" hypothesis above.

HeroSeries panels and face masks use 630nm red light

• 810 nm transcranial plus intranasal LED brings "better sleep" in dementia (case series)
  
  Five people with mild to moderately severe dementia used an 810 nm pulsed LED device (weekly in-clinic transcranial/intranasal plus daily home intranasal) for 12 weeks, improving MMSE (p < 0.003) and ADAS-cog (p < 0.023) scores, with families reporting better sleep, fewer angry outbursts and less anxiety and wandering; benefits faded in the four weeks after stopping.

All HeroSeries panels use 810nm NIR light

• 660 nm and 850 nm LED Improves Sleep in Shift-Work Nurses
  
  In a trial with nurses who had trouble sleeping due to shift work, using a cap that shines 660 nm red and 850 nm near-infrared LED light on the head for 30 minutes, three times a week for a month, greatly reduced insomnia symptoms and improved overall sleep quality, plus lowered depression, anxiety, and stress.

• 660 nm and 850 nm whole-body light bed shortens sleep but improves recovery markers in soccer players
  
  Twelve female college soccer players using a 660/850 nm whole-body LED bed for 20 minutes up to twice weekly slept about 40 minutes less on treatment nights but showed a lower resting heart rate and a trend to higher heart-rate variability; an observational study, so the shorter sleep should be read with caution.

• 850 nm LED Boosts Well-Being but Not Sleep in Mild Sleep Issues
  
  People with mild sleep problems who sat under an 850 nm near-infrared LED lamp for a few hours a day, five days a week in winter, felt better overall with less drowsiness and better mood, but it didn't directly improve their sleep quality or rhythms.

HeroSeries panels, HeroBelt and HeroHat use 850nm NIR light