The light is not very bright at all. I've had it one day and now the on/off won't work. It just stays on, I can't change the brightness or turn it off. I have to unplug it to shut it off. I like the USB plug, it was great for me as it sits next to my Surface docking station and I could plug it in there. What a let down overall. Not worth the hassle to return it for $18.