For the Ocean LED lights, yes you have to drill a hole through the transom. The hole is the size of the power wire (maybe 2/10ths of an inch). The light itself is flush mounted.
The new issue of Powerboat Magazine covers the install process on my boat. Check it out.
This is what I have on my 47' Post (9 of them). Mine switch back and forth between white, blue or both. Side by side one is much brighter than the Ocean LED.
This is what I have on my 47' Post (9 of them). Mine switch back and forth between white, blue or both. Side by side one is much brighter than the Ocean LED.