15 MM bayonet with off-set pins, two electrical contacts, fits many anchor light housings, including Aqua Signal series 40, 41, 50, 55, Perco series 200, Hella series 2984 and 2386, and others.
0.1 amps. About 1/20th the energy of the original bulb. This can be the most effective bulb replacement on the boat, since the anchor light can be on for many hours a day.
Certified by testing agency approved by USCG (documentation available) when used in Aqua Signal series 40 housing. 2 mile visibility.