- Exposure to bright lightsuppresses melatonin (the sleep promoting hormone)and has circadian phase shifting characteristics [1-3]: It is able to advance or delay our internal body clock, and is naturally used by our body to align theinternal clock with the day/night cycle, thus regulating sleep.
- The human circadian rhythm is most sensitive to short wavelength blue light [1, 2]. When white light is used, 185 times the intensity is requiredcompared to blue light, to achieve the same effect.
- Light exposure and its impact on our physiology is time-dependent [5, 6]: Generally, light exposure in the morning advances the body clock, whereas light in the evening delays the body clock.
- Even 15-20 minutes of exposureto blue light, with intensityas low as 90 corneal lux,is sufficient to cause a shift of thebody clockand reset the sleep/wake cycle.
The Circadia Therapy Lamp is a portable therapeutic blue light device that helps you improve your sleep. A result of decades of research, and used as standard treatment for numerous sleeping problems by sleep doctors, blue light can serve as an anchor for your internal clock and help your body know when it is time to be active and when it is time to rest.
Wake up refreshed
Let your body know that it is morning and time to get active by taking just 20 minutes of blue light right after you wake up. Just place the lamp on your breakfast table and feel your morning grogginess disappear!
Boost daytime energy
Feeling that afternoon dip? Want to reduce your coffee intake during the day? Just take some visual caffeine by placing the lamp on your work desk! Circadia Blue Light suppresses melatonin (the sleep promoting hormone) and has been proven to boost alertness and mood during the day.
Fall asleep faster
Avoid blue light in the evenings, to allow your body to wind down and prepare for bed. Just flip the Circadia Therapy Lamp 180° and activate Deep Red Light. Red light has the least alerting effects and lets your body build up melatonin. The quickest way to get a healthy night’s rest!
Beat jet lag
Use blue light therapy to shift your body clock to a new time zone and beat jet lag. Just enter your flight details in the Circadia Sleep Coach App, and we will give you a day-by-day personal therapy plan. Always be in sync with local time!
Use the Circadia Sleep Coach App to get personal recommendations on when to use your Circadia Therapy Lamp, alongside dozens of other curated digital therapies to help you sleep better.
We only ship to the USA at the moment.
- Light therapy is a standard treatment indication by the American Academy of Sleep Medicine (AASM)for treating those suffering from chronobiological aspectsof insomnia. These include:delayed sleep phase syndrome, advanced sleep phase syndrome, irregular sleep/wake cycle, non-24-hour sleep-wake syndrome, jet lag, social jetlag, shift work, dementia, and sleep complaints in the healthy elderly[9, 10].
- A meta study including 53 studies and a total of 1154 participants, found that light therapy was effective in the treatment of sleep problems in general, and forcircadian rhythm sleep disorders, insomnia, and sleep problems related to Alzheimer's disease/dementia specifically .
- A review concludes that there is sufficient evidence to warrant bright light therapy for the treatment of chronic sleep onset and early morning awakening insomnia .
- Especiallyyoung people suffer regularlyfrom insufficient (<7 hours) sleep on weekdaysand have a one to three hour delayin their sleep/wake timing[14, 15].
- This trend tostaying awake in theevening and resulting discrepancy between the body clock and the day/night rhythmis known as social jetlag, andis associated with reduced sleep quality and cognitive performance.
- Bright light therapy in the morning coupled with cognitive behavioural therapy, has been shown toincreasetotal sleep time, result in earlier bed and rise times, and reduce daytime sleepiness[18, 19].
- Increasedlight exposure at night, for example through electronic device usage, suppresses the production of melatonin, keeps the body alertedand thus results in increased sleep onset latency and reducedsleep quality [16, 20].
- However, long-wavelength red light does not suppress melatonin levels and therefore has minimal circadian phase shifting effects .
- Blue depleted ambient light in the evening has been shown to reduce both melatonin suppression and alertness, creating a better sleep environment and allowing the body to prepare for bed.
- It has beenfound that exposure to red lightbefore bed can be highly effective to promote sleepiness and maintain regular sleep/wake cycles.
- Daytime exposure to bright light has been shown to suppress melatonin levels, decrease sleepiness, increase subjective alertness and improve performance on tasks requiring sustained alertness and fast reaction times [24, 25].
- When testing the effect of blue-enriched white light in an office setting, it has been found that increased light exposure in the workplace leads to increased alertness, positive mood, increased performance, reduced irritability and increased concentration. Daytime sleepiness was reduced and participants reported better sleep during the night .
- Light therapy has been shown to raise levels of self-reported wellbeing and vitality in healthy people, particularly during winter time .
- Studies which have tested the efficacy of light therapy on patients suffering from seasonal affective disorder (SAD), found that light therapy caused a faster response and had fewer adverse effectsthan drugs.
- Low-intensity blue-enriched white light was found to be as effective ashigh intensitybright light in treating SAD 
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- Thapan, K., J. Arendt, and D.J. Skene, An action spectrum for melatonin suppression: evidence for a novel non-rod, non-cone photoreceptor system in humans.The Journal of physiology, 2001. 535(1): p. 261-267.
- Lewy, A.J., et al., Light suppresses melatonin secretion in humans.Science, 1980. 210(4475): p. 1267-1269.
- Warman, V.L., et al., Phase advancing human circadian rhythms with short wavelength light.Neuroscience letters, 2003. 342(1-2): p. 37-40.
- Ruger, M., et al., Time-of-day-dependent effects of bright light exposure on human psychophysiology: comparison of daytime and nighttime exposure.American Journal of Physiology-regulatory, integrative and comparative physiology, 2006. 290(5): p. R1413-R1420.
- Khalsa, S.B.S., et al., A phase response curve to single brightlight pulses in human subjects.The Journal of physiology, 2003. 549(3): p. 945-952.
- Chang, A.M., et al., Human responses to bright light of different durations.The Journal of physiology, 2012. 590(13): p. 3103-3112.
- Chang, A.M., F.A. Scheer, and C.A. Czeisler, The human circadian system adapts to prior photic history.The Journal of physiology, 2011. 589(5): p. 1095-1102.
- Morgenthaler, T.I., et al., Practice parameters for the clinical evaluation and treatment of circadian rhythm sleep disorders.Sleep, 2007. 30(11): p. 1445-1459.
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- Gradisar, M., G. Gardner, and H. Dohnt, Recent worldwide sleep patterns and problems during adolescence: a review and meta-analysis of age, region, and sleep.Sleep medicine, 2011. 12(2): p. 110-118.
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- Roenneberg, T., et al., A marker for the end of adolescence.Current Biology, 2004. 14(24): p. R1038-R1039.
- Chang, A.-M., etal., Evening use of light-emitting eReaders negatively affects sleep, circadian timing, and next-morning alertness.Proceedings of the National Academy of Sciences, 2015. 112(4): p. 1232-1237.
- Díaz-Morales, J.F. and C. Escribano, Social jetlag, academic achievement and cognitive performance: Understanding gender/sex differences.Chronobiology international, 2015. 32(6): p. 822-831.
- Richardson, C., et al., A randomised controlled trial of bright light therapy and morning activity for adolescents andyoung adults with Delayed Sleep-Wake Phase Disorder.Sleep Medicine, 2018. 45: p. 114-123.
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- Chellappa, S.L., et al., Non-visual effects of light on melatonin, alertness and cognitive performance: can blue-enriched light keep us alert?PloS one, 2011. 6(1): p. e16429.
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