The WEST MARINE G4 Bi-Pin LED Premium High Output Bulbuses cutting edge LED chips, drivers and construction offering the highest levels of performance, efficiency, and reliability. This results in dramatically reduced power consumption while having greater light output than the majority of bulbs of its size. It will produce bright flicker free light which will render true and vibrant colors, and reduce eyestrain compared to lower quality LED bulbs. This is achieved using high efficiency chips and drivers which produce more light output per watt of power consumed. This is the ultimate 12V G4 LED bulb available today that will fit the majority of fixtures, protruding only 35mm from the socket. This bulb utilizes a ceramic case for heat distribution and resistance, and outputs 395 lumens in all directions. This is a natural or "true" white bulb. 11-14v input range. This is a high power LED and should not be used in tightly sealed fixtures not designed for high power bulbs. Note this bulb is polarity (+/-) sensitive, if it fails to light when inserted into the fixture, remove the bulb, flip 180 degrees and re-insert. Dimmable.