Depends on how old your animals are & what you are trying to achieve?
Adults at this time of year will be in cooling as it's breeding season, if your animals are youngsters & you intend to feed through the winter you might want to add some heat but there are plenty of different ways to achieve this.
Maybe set up a heat mat at an ambient night time temp. It can be frustrating when someone advises you to use"infrared" as ALL incandescent light emits infrared. I never understand why pet shops start talking about infrared lights, either they have no idea of basic science or they are trying to sell you something you dont need. You will find plenty of reptile keepers avoid buying "specialist" reptile lighting & buy globes from outlets such as bunnings because of the cost.
However lights are not the only way to heat the enclosure, research heat mats, reptile radiators, heat cords etc, there are planty of items on the market that can fill your needs.