DIY deicer

[Esther]

 There are other ways of installing a lightbulb but I like the automotive drop light better. I put wire screen around the frame under the light bulb incase it gets broken. And the lightbulb is the type that is used outside. I used two plastic tubs to try to achieve a little insulation. If you can't find a tub with a handle, cut holes in the top and put a piece of rope through the holes and make a knot inside.

[croft]

Esther, what size (watt) bulb do you find most effective? I'm in zone 5 and use a 2 bulb system (the socket from an outdoor light). Right now it has a 75 watt and a 40 watt. It worked fine last winter but I'm wondering if I can just use the 75. I guess I'll just have to try it this winter and see . Our coldest winter temps get to around -20*C which is about -4*F.

[Esther]

I used a 75 watt but will just change it to a 100 if this winter is colder than last. I had thought about putting layers of that sheet styrofoam insulation between the two tubs to insulate. That would help. But don't seal it up too tight so there remains places for air exchange.

[frloplady]

get the foil backed bubble wrap type insulation..it's high R for the thickness and helps reflect the heat down.  I used one the last few years and used 2 13watt flourescent bulbs...yup thats all folks.   Really 2 was in case of burn out of one of the bulbs..but used it 2 winters and neither ever burned out!  Temps down to 0 here and the ice on the rest of the pond last winter was 8-10 inches thick.