Im purchasing a baby veiled chameleon in a few weeks and I have a 30 inch high terrarium. I was told that a 10.0 can burn the chameleons skin and eyes because its too strong. Should I purchase the 5.0 and use it until I put the chameleon in his 4 foot high terrarium. When I put the adult chameleon in the 4 feet high should I use the 10.0 or return it and always use the 5.0? I know that the 10.0 goes down 20 inches and the 5.0 goes down 12 inches. Please help and respond