In the wintertime the evenings get dark and therefore plunging in to the dark lake is not as pleasant as it is in the summer. Led lights to the rescue!
Above is a photo of the lights in a pool, or actually a hole in the ice in a lake.
Submergible led lights can be made with a car battery, a couple of 1 watt leds, a constant current driver, a piece of clear 1 inch diameter PVC hose and two small pieces of e.g. aluminum profile for led heatsinks. The leds Continue reading Submergible 12V swimming pool lights