Lamp,and the digital power supply (ballast) work great so far but the timer failed to function after two weeks of use. The only way to obtain a replacement is to mail back the entire lamp system at my cost. Not worth it for a cheap timer. Buyer beware.UPDATE - I contacted the seller directly and they mailed me a replacement timer at no cost. Let's hope the replacement timer lasts longer than the original. I've bumped my review rating from 1 to 4 stars given the prompt customer service.Great product.. had to send one ballast back because it was faulty. however if you get a decent one they work fine.. be prepared to test them and potentially send back until you get one that was actually assembled correctly.Worked great for 3 months and now the ballast is not working.Edit*They responded Immediately and got a replacement shipped out for free. Real easy. But being without my main flowering light for 10 days while in week 5 flower wasn't good.I used this light system for three months before the ballast crapped out. It was barely out of the return window. When I contacted iPower directly for warranty support I have been completely ignored. Fortunately I purchased a new light immediately to a wood garden damage. I will gladly update this review if iPower decides to follow up on my several month old product support inquiry. Not holding my breath.Replaced an old Diamond 1000w hps, this is much quieter, just as bright, and stable.I was able to remove socket and cord assembly and put it in the old Diamond reflector with glass.Still new, but hopeful it last long :)Great all around for indoor growing!Overall best grow light value for mh and hps light system. Electronic ballast is state of the art. Timer works flawlessly. Highly recommended.WOAH. The light has multiple settings. 600, 750, 1000 and 1000+.I don't use 1k+ because it'll burn your light out quicker.750 really is a sweet spot. Love this light