Signal Mate's next-generation White LED Deck/Spreader Light with Mast Mount has three (3) high-brightness LEDs and a Khatod 10 lens.The Deck/Spreader Light emits 3300 lux at 3', which lights up an 8' diameter at 20' (90 lux) and a 12' diameter at 30' (40 lux). Small but robust, this light uses constant current drivers and thermal management to achieve 50,000 hours LED life. Constant brightness over the full operating range of 10V to 30V DC insures the light will meet or exceed nautical mile requirements if the battery voltage drops. Active & passive RF filtering to prevent radio interference. Reverse-polarity protected, surge protected, waterproof and vibration-proof. Five-year warranty.