Soft white is fine. Yes they give off some uva. I prefer the 2 buck 45-65 watt spot lights. There is nothing special about the cool whites at the pet store with a lizard on them. They dont have phosphors so they cant make one light put out more uv anthing than another light, call they can control is how hot the coil is in the light bulb, that makes it a warm white or a cool white.
If you want out door looking like, get the cool white. it should be in the 5-7k range(real light is 6.5k), warm white is all the way down in the 2-3k range.