The Original Thru-Hull with the world's smallest hole cut-out for a thru hull light at only 1"! The 2010 with a 13⁄16" (30mm) profile head and the brightness equivalent to some 50w Xenon makes it ideal for transom mount applications. Ideally suited for boats up to 65' (20m) using 2-6 lights with spacing of 3-5' (1-1.5m). A very quick-to-fit light using Deutsch plug-and-play quick connect electrical installation system. Suitable for Fiberglass, GRP and wooden hulls, and now also available for use on aluminium/steel hulls using the Delrin Sleeve option.