So if I buy this unit, then I won't need to have a separate timer for my heat source? For the 12 hours, it's on it'll regulate temp and then it'll turn them off? What does it do during the night? Will it still monitor temp/or turn the light on if it gets too cold?

I don’t mind anything about the price. I knew it would be a bit costy at first. c: I’ll go ahead an order that. I found it on amazon already. ( https://www.amazon.com/Exo-Terra-Thermostat-Reptile-Terrariums/dp/B08R2BJMXP/ref=mp_s_a_1_3?crid=32NWIAO0SGLUT&keywords=exo+terra+600+watt+thermostat&qid=1671495921&sprefix=exi+terra+600%2Caps%2C421&sr=8-3&ufe=app_do%3Aamzn1.fos.006c50ae-5d4c-4777-9bc0-4513d670b6bc ? )