I use the Exo Terra sunray. It cost about $75 if I remember correctly. The first 3 months or so, it was too intense. I was getting UV index readings greater than 10 at like 13 inches! It was providing a ton of light and ample heat, but is was absolutely frying my plants. Luckily, I used my grow out period for my enclosure to help “season” this light. Without an inhabitant in the enclosure I wasn’t worried about burning some leaves. After about 3 months, I saw a substantial drop in UV index output. I measure about 4-6 at 8 inches (through aluminum screen). This is still high, but I utilize a canopy layer of ficus plants to help knock this number down. After using the light for well over a year, I still measure ample UV index with my solarmeter, and the light provides safe levels of basking heat. With any lighting system, you have to be careful to measure levels of both UV index and heat output before you subject your animal to their rays. I also use one of Todd’s quad setups with Arcadia t5’s. Never skimp on your lighting. It’s too important to your chameleon.