its a 10g zoomed on one side and the light above on the other side temps are 92 hot and 85 cool during day i just got them in this setup so not sure about night temps but i dont wanna freeze them tonight. Before they had a higher watt bulb in the day and a lower red but i finally have the uth and want to eliminate the light at night but if i cant thats fine too. and if they dont need a drop at night im not as concerned but most the care sheets i've read say to up in day and lower at night.