Scientists claim they could be more effective at keeping you alert than caffeine

Could blue lights replace a daily cup of coffee?

• Blue light is harmless to tissue but can trigger biological effects in the body
• In a study, people exposed to blue light performed better at distraction tests 
• The same test, proved too much for caffeine users who performed poorly
• It builds on research that has found blue light can improve cognitive abilities

By Ellie Zolfagharifard

Blue light has been getting a bad reputation lately for its role in disrupting sleep.
Smartphones and other gadgets used before bed can cause restless nights because their light causes melatonin suppression – a chemical which controls the body clock.
But there are some positives, according to a recent study, that looks at how blue light can make the brain more alert if it is used at the right time.

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http://www.dailymail.co.uk/health/article-2511979/Could-blue-lights-replace-daily-cup-coffee-Scientists-claim-effective-keeping-alert-caffeine.html