Here is a variation I am using that uses a juice can instead of cookie tin. You need some bricks or pavers to make a base for your waterer and the juice can (like the ones for pineapple and tomato juice) fits over the light bulb and electrical box to keep it dry in case you spill some water, or from rain or snow. I am also using a thermocube that will cut the light on only when it gets down to 35 degrees. Use a blue plastic electrical box as when I first tried a metal one, the GFCI outlet detected a ground and tripped.


