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Artificial blue light can negatively impact your sleep. When you expose yourself to blue light that comes from smartphones, tablets, laptops or even lighting in your home this supresses melatonin which is your natural sleep chemical in your brain that helps you fall asleep. Changing your screen colour alone isn’t enough for limiting the impact of portable electronic devices on melatonin levels at night, and you should always wear Blue light-blocking glasses if you are going to use any light emitting device in bed at night.