I bought a 55Watt floor lamp from FullSpectrum Solutions. After about 3.5 year the ballast went bad. But since I was out of warranty they couldn't help me. Beware of advertisements about saving money with full spectrum lights as the accompanying ballasts fail earlier than the bulbs themselves and are costly to repair if at all possible. In pretty much all the cases you have to buy the entire lamp. Maybe these companies will be better quality by the next century.