I'm thinking of how to keep the temp. up in the winter for ceratophrys tanks. The day time temp will be fine because the light will keep it above 75 and i'm switching to glass lids soon for better humidity. But i'm worried for the night time temp. My house shouldn't get lower then 67. Will a heat mat on the side of the tank keep it at 70 during the night? Should i run the light during the day and heat mat at night?