the 5.0 and 10.0 are uvb lighting.. you must have uvb lighting.. they need it to get vitamin d3.. and calcium with d3 and calcium without d3 supplements,vitamin supplements, and you need an all screen enclosure.. but that depends on the age of the chameleon.. these guys in this forum know thee stuff.. search around old post and you will find this answer.. they will also need more info to answer those questions..