I purchased a single MaxLite bulb for $1.00. When I got home and installed it, it did not light up. So I called the Company to let them know of the defect. The presentative said "no problem". But here's the rub. I received a letter requesting a cash register receipt or a UPC symbol from the package. No problem. But then they requested a $4.00 check or money order per CFL. Why would anyone pay $4.00 for a replacement bulb, when you can purchase a replacement for $1.00 plus tax? So much for a company standing behind it's product. If you have a choice, don't select MaxLite. You may be purchasing a defected bulb.