whats the big deal w uvb? i have iguanas living in my room with uv bulbs everywere i practically live under those lights, no skin canser or anything and i know my lizards require their calcium from the lights ive never had any ill efects from the lights and i look at them and hold my iguanas under the lights constantly??? i also let my iguanas live in my grow room from time to time they eat the big fan leaves and stay off the plants, however they do swim and shit in my resevoir sometimes it adds nutes to the water.lol.. they also love the heat from the hps lights they bask in the light,, theyre my buddies, 1 female named buddy 1 male named red they are both near 6 feet long and are great pets however my dog is afraid of them and she is 120lb french mastiff