Ultra low current draw Port, Starboard and Stern lamps consume less than 3.2 watts combined. No bulbs, No maintenance, Ultra long service life Hella marine LED technology has no filaments to break making NaviLED®PRO lamps extremely shock and vibration proof for proven reliability and safety in demanding conditions. MultivoltTM 9-33V DC Advanced electronics ensure reliable illumination and lamp protection even under severe voltage fluctuations and low battery voltages.