Re: 1st Vivarium 36x18x36 Exo Terra
I didn't realize you had a water feature.
Make sure the water level is high enough and add a cheap ~$15 50w or less aquarium heater to your tank. There's an Aqueon or Tetra one on the market with an auto setting of 78F.
Water is a great insulator and you don't have to deal with another light fixture or weird color light.