Expect to see several sleep-focused technology products debut at CES 2015. The BBC provides a preview.

Among the more colourful stands was a company called Holi with its Smart Lamp and Sleep Companion, a smartphone-controlled coloured light that relaxes you into sleep with warm red and pink light and wakes you up gently with the help of a blue hue.

The reds and pinks direct the body to release sleep hormone melatonin, the company claims, and the blue light wakes the body up before the alarm wakes the mind.