I have never used halide light but i'm also curious how many microwatts UVB/ sq. inch the halides produce. I had a bad experience with an R zilla T-5 bulb(that was later recalled due to excessive UV output) that turned my day gecko black! I have had success with 10.0 bulbs and spot basking lights but if there is something more ideal that doesnt over or under do the lighting requirements of my basilisks then i feel they deserve it. My other concern is temperature. I keep a variety of animals and i need to keep my house at about 75 degrees. Are there low wattage bulbs that are effective at localizing a hot spot or ones that can be run on proportional thermostats? Thanks for any responses