Yes it buzzes, and I know for sure that it is not the bulb because I have several and none of them light up. I am thinking the blown fuse in the plug may be my problem. I have taken apart the ballast and I see no problems there, either. Do I just need to replace the plug and connecting wire? I used it for 4 weeks before this problem and I had to replant outside causing MAJOR stress to the plants but the ones that lived are thriving outside. I need my light, though, because I planned on growing inside all year long. Thank you for answering me, guys.