I am working on a foam waterfall project. I would like to add LED lights to lit the water. Does anyone have examples of such project? I have seen a few images on google but nothing explaining the wiring and such. I wonder if I could power a few LEDs with a little watch battery (not sure how we call those) and change it just a few times a year? Or am I better to plug it in a power outlet? I was thinking of creating a false bottom to the "lake" and insert the LED between the layers of glass or plexi. I am not sure it is the way to go, I am worried about the humidity level.. this is the reason I thought about using the watch batteries!