Long-lasting light is totally waterproof and requires little or no maintenance under normal use. Its rugged plastic construction is impervious to the most severe weather conditions and saltwater corrosion. Flashes 30 times per minute and lasts up to one year without a battery change. Electronically shuts off during daylight hours and automatically turns on at dark. Operates on 3 Alkaline "D" cell batteries (not included). White bulb.
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