Did you know that the blue light your smart phone emits at night can gives your brain false signals that it is actually morning?

Switch off smart phones or tablets as the blue light is actually destroying your sleep, researchers warn.

“One of the best biological cues we have to [tell] what time of day it is, is light. And it turns out that blue light in particular is very effective at basically predicting when morning is,” Brian Zoltowski from the American Chemical Society was quoted as saying in media reports.

When light hits cells deep inside the eyes, they send a signal to the ‘master clock’ of the brain that dictates when we wake and when we get sleepy, Mr Zoltowski explained.

After witnessing blue light, these cells sends a ‘wake up’ signal at night, messing with sleep.