Is what a heater? The tall skinny thing? thats my fan. And the big white thing over my plants contains my 600watt light and then the thing in the plate is a small 150 watt desk light that i am keeping on my plants for a few days. And yeah it gets hella cold in my closet too since its winter now but i dont want to put in a portable heater cuz i allready have too much shit going to outlets.