Light at night is bad for your health. Electronic devices such as mobile phones, tablets and even TVs emit “blue light” which can disturb sleep.

Young people are suffering most, as nine in ten young people say they do not get the recommended seven hours of sleep.

Sleep researchers have linked short sleep time to increased risk for depression, weight gain, diabetes, heart attack and cancer.

They recommend avoid using those devices two hours before sleep.

Switch off the blue light - Sleep tight!