I bought this growlight garden not even a year ago and I thought one of the lights burned out. I bought new lights and now I find out it is the ballast that is no longer working. I have no idea how to get a replacement ballast. Also, the unit is very difficult to move up and down. Quite frankly, I wouldn't recommend this to ANYONE. Another piece of junk that I have to throw out. It wasn't even used that much.