you know whats the best thing about this? since its powered by usb, and if you got a tv with a usb port, lets face it, unless u bought ur tv 10 years ago, you should have one, it will turn on automatically everytime you turn on the tv. yea. so basically its on only when you watch tv, and off when you turn off the tv. of course, u can manually set it if your tv is weird, but hey, mine works out just fine. i keep mine white as its a distraction have dimming / different colours shimmering. but it does make the room much more cosier at night time while watching tv. best purchase ever for my tv.