When I first got this, I found that the power button made the time flash for a second, then everything went dead. The company sent a replacement. I realised what the problem was: the instructions say to hold down the power button for about 3 seconds, but if you do this the clock comes on then goes straight off again. You have to release the button the moment the clock comes on. Then it's OK. Other than that, this is a nice lamp. I expect the sunrise function will be a great help when winter sets in.