I had Ocean LEDs professionally installed on my mono hull
sail boat. Two in the stern.
Thru hull, cost installed was $ 1,600 total for both. These in my opinion are the best quality. You can unscrew the entire unit, without leaving a hole in your
boat. If you are considering this, don't go
cheap, your boat might sink in the process.
Here is a link from my blog, and you can see them in use, also I installed matching spreader lights. Total install was close to $4,000 for both.
Highborne Cay, Exumas « Blogging aboard Black Diamond! once you get to this page, you'll have to scroll down to about the 20th pic, sorry.
You'll notice some guys swimming by the boat with the lights on, we are in highbourne cay marina in the
Exumas,
Bahamas, this marina has a large population of sand sharks, apparently harmless.
Underwater lights use,
fishing, but illegal in some areas for fishing. I installed them just to look cool. The spreader lights look cool to, but they have a
safety purpose, for working on the
deck at night, you won't lose your night vision.