Only one bulb really worked properly, the other had a loose part which rattled inside and flickered with a VERY faint light when I could even get it to turn on could, but the one that works, so-so quality. Not the gloomiest, not the brightest, not even the coldest shade of white. Tried to get even coverage at 60 gallons. The brand new bulb was noticeably dimmer compared to my 6 year old Aqueon bulb that I had installed on the other side. Tried to be "thrifty". I will spend $10-$15 more and buy more Aqueon brand fluorescent lights.