So switch off your main bedroom light and turn on a warm-coloured lamp instead. If you have a smart bulb such as a Philips Hue, skip the whites, blues and purples at night and go for reds and ...

A little boy, Anshu, wonders what happens when his Dad switches his bedroom light off at night. Anshu explores his bedroom as his eyes become accustomed to the dark, noticing the different light ...