Sleep gadgets: our writers put them to the test

From sunlight lamps to white noise devices, we roadtest popular gadgets to see if they can improve our sleep

Research has shown that sleep deprivation can impact our productivity at work, and even curtail our earning power. With so many of us failing to have a good night's sleep, can technology help? In recent years, all sorts of gadgets and apps promising to enhance our sleep have exploded on to the market. But do they really work? From sunlight lamps to white noise machines, our writers put some of the most popular sleep gadgets to the test.