There are special black heat light bulbs that you can purchase that you can leave on at night. During the summer months we take the turtles outside and let them hang out in a small kiddie pool. They really seem to love the larger swimming space and the unfiltered sun. We just stick a few rocks in the pool and they bask away all day. I'm sure chicken wire would work just as well.
Turtles are a lot of fun.
They can also be a lot of work. If you want a healthy, happy turtle it's going to take a lot of effort on your part. I don't know about other states, but here in Connecticut they cannot sell baby turtles because of salmonella problems. It's important to remember to wash your hands each and every time you touch your turtle. Although a turtle may be healthy, many organisms can be carried by it and transmitted to you.