It is my first time growing. I have a 4 cubic meter grow tent, 400w lamp,oscilating fan and a 170 cubic m/h extraction fan. Should I leave them on 24 hours or have them on when the lights are on or does it depend on tempeatue? In day time tmperature does not go above 20-25 c and night time 10-15 c. Should I increase the temperature ar night? Cheers for the advice.
you need to get a thermostat controller.....plug in you exhaust fan to it and when your room/box temps get too high it will turn on the exhaust... otherwise you are gonna run your fan too much or not enough.
I use the Ranco ETC thermostat. You can buy them prewired (basic plug and socket on each end) or buy an extension cord, cut it in half and wire it yourself for 30 bucks less.