don't get carried away. This is one of those cases where more isn't always better. Don't go putting them right next to a radiator or a register. I've got several cases "hiding" in the closet right now 'cause my basement is too cool at about 63F. SWMBO just loves that lemme tell ya
BTW what yeast did you use? That can have an impact on how quickly it will carb as well as what the appropriate temp is.