I hear so many things about UVB lights. Some say to change the bulb every six months, but the manufacturer says their bulb emits UVB rays for a full year. Then there's the question about strength. What is best for a chameleon, 5.0 UVB or 10.0 UVB, and why? I am about to hit that 6 month mark, even though it's a one year UVB bulb, and now I'm wondering if the 5.0 bulb is emitting enough light. So what say you? I don't think giving a brand name really matters, because there seem to be opposites for every brand. If I say I use Fluker's, they say, "Aw, that stuff is crap. I use so and so and it's much better." When I ask why it' s better, it's usually just because it's what they use. So help me out with the 5.0 versus 10.0 UVB bulb question.By the way, my enclosure is 18X18X24, and the chameleon is a Dwarf Fischer's. Thanks.