Product Features: At least 50 times the life of comparable incandescent bulbs. Uses approximately a 10th of the current of comparable incandescent bulbs. Shock Vibration resistant, no filaments to break. Corrosion resistant nickle plated bases. Lower heat generation than comparable incandescent bulbs. Marinized construction for the harsh marine environment. System Volts: 12 Voltage Range: 10.5V-15.8V. Candle Power: 4000MCD. Draw: 20 mA. Life (hrs): 50,000. Not for use in navigation fixtures