I got a UVB light few weeks ago, and already i have noticed a huge change in my 4 month old veiled chameleon. She is much more active, is finally gaining weight, and her colors are looking much better. Getting a UVB light is worth it! I spent $40 for the light bulb and fixture, but overall, it is worth it! If you haven't gotten your chameleon a UVB light yet, because of costs, or because u think it doesn't do any good, just do it, go buy UVB lights, you'll be glad you did!