The 25 watt doesn't get too hot - the cooler itself is 22"x15" and 15" tall with the lid on. It was one that medicine was shipped in to a local doctor's office. I was supposed to throw it away but I can't bring myself to do that so I always bring them home and find a good use for them.I have lots of stuff stored in my sheds in them..... I had a 40W bulb at first and it got up to 113 in just under an hour - 25 is perfect for this size cooler.......![]()
I built this not even thinking I need a thermostat but now everyone has me convinced I need one.It's working without it so I don't know......and it's only a 25W bulb.....not too much electricity......![]()
It will use even less once you get a thermostat because the bulb won't be on all the time. The thermostat regulates your temp once you set it. The bulb only comes on when the temp drops to your set point.