Sorry i have to disagree, it should run 2/3 of the cage at least, so a 24". Hides offer shaded spots, when my female was smaller i didnt offer a full hide but a platform she could sit under. babies can be skittish and will hide alot anyway - but they do need UVB, so many people esp breeders will not offer any hides for this reason. the should have a nice temp gradient with a 'cool' spot to chill out of they get too hot!