Heater...?

hi im going to be growing my plant in a fridge....lool i know...
but its a a commercial one...its like a massive case with a door...i dont use it any more and its never on...

is there anything i can use to warm up my fridge without damaging the fridge or the plant...??

i cant heat the room...

your light may be good heat.

nahh...the box has to much space...it will take forever to heat up using light