Hi, i am just getting some about 3 week old crested geckos. I'm going to get 3. The tank i have is L30xW12xH22. My question is, is the tank to big? Will it be too big for them to hunt down the crickets? Also, the normal temp in the tank is 60F. So, i'm going to use a 40watt light bulb. Is that a good idea? Thx, for any help. 

