DeepSea offers plenty of standard through-hulls, but its hottest and newest lights are known as the Matrix series. These LED arrays house 32 high-intensity lights in each unit to produce an eye-numbing 6,000 or 18,000 lumens, in either a spot or flood pattern, and they have a 50,000-hour nominal LED lifespan. Construction is ridiculously rugged, solid state and shock/vibration resistant. These lights can shine both above and below the surface, unlike most underwater lights (which will overheat if used dry), and they have a 6,000-meter depth rating, making them suitable for applications ranging from sport-fishers to mini-subs. Available colors are white, blue and green - you can see them all at www.deepsee.com.