Margus Triibmann of the Estonian design studio Keha3, designed this LED lit buoy. Made of translucent polypropylene, the buoy comes a 15 meter waterproof cable. The accompanying documentation helpfully points out that by placing the buoy on land, the buoy can be used as a decorative hanging lamp or as a floor lamp when provided with an appropriate stand.
Nothing like tape, an LED, and a coin cell, and an Orangina bottle to impress your wife.
Evil Mad Scientist combined some LED throwies with sea urchin shells to create these interesting little lights. Throwies show up a lot on Make, probably because they’re brain dead simple, and like everything with LEDs, fun to look at. Wikipedia even lists some throwie derivatives.
I guess this means LEDs are the new candles. They’ve already taken over floaters, but at least the tea lights still have hot air balloons.