Sol-Mate lights up water garden, ponds, water fall, bird bath or pools. The built in LED lamp will last up to 100,000 hours and best of all you can truly get years of enjoyment out your investment since the rechargeable batteries can be replaced unlike the batteries used in many other solar products. Measures apx 4" across. Advanced solar technology allows charging even in partial sunlight. A full charge will yield up to 10 hours of light. It turns itself on at dusk and off at dawn. Price is for one light available in white, red, or blue.