I have NEP 20" 6x18w T5's over my little grow out tank. Recently, one of the bulbs has stopped working. I've tried swapping different bulbs and always get the same issue. It's on the "actinic" 2 bulb switch. 1 bulb fires fine with no issues, the other bulb lights, but extremely dim with waves going up and down it. I took the fixture down and checked out the endcaps, they look fine with no corrosion or anything that I see could be causing a bad connection. I thought it was the ballast, but with the other bulb firing, I wasn't sure. Anyone have any ideas? If it is the ballast, anyone know where I go about getting a replacement? I know nanotuners has the cool new 30w upgrade, but this is just a small grow out tank and if I'm going to spend $200, I'll just go to MH. Any help would be appreciated.