question about light wattage

wat wattage should i get i never really had to u heat lights so i dont know wat wattage is going to be a good temp wit my baby balls i really dont want to buy a light and have it not have the correct temp

Get a 60-100watt che and run it off a stat,and set the temp to 94 degrees f. that should be ok. the che willlast for ages so it should even do when you upgrade to a bigger viv.