The watts don't matter as long as the thermostat is rated higher than the heat source is. More watts doesn't equal better thermostat. You need to get a good quality thermostat though. A cheap poorly made thermostat is just an accident waiting to happen.
Here are some good thermostats:
Budget: http://www.amazon.com/Hydrofarm-MTPR.../dp/B000NZZG3S
Mid-Range: http://www.reptilebasics.com/thermos...stat-prewired/
Best: http://www.spyderrobotics.com/home/products.html (For a single heat source I would suggest the Herpstat intro + or the Herpstat 1
Get the best you can afford, a good thermostat is invaluable.
Stay away from the junk sold in big box pet stores.
Reply With Quote