Mr. C. I agree that it's probably a ballast issue. We get a lot of power outages here, and spikes and drops. It can't be too good for electronics. That is my 3rd light. I don't know if they will tolerate another exchange. Actually I'd say it's time to get my money back and try a different brand. Just got some T-5's, we'll see how they hold up in there. Thanks for the link.