uv lights.. how many..

[peterm15]

i have the option on getting a one light fixture and a 2 light.. i was thinking 2 but i have heard of overdoses, i dont know if lights did this or powder... but either way it will be mounted inside the cage along with 2 ceremic light fixtures..

so ahould i use 1 or 2.. when i get the cage done ill post pcs to try to get some advive on where to put the ceremic fixtures to get a proper gradient and basking and night drop...