everyone in my marine with coastal night lights hate them!!! They get covered in growth fast and do not clean well. He has been good with replacing them,, but they should not need to be replaced. Also, lots of LED's burning out. Had a friend have his first set go bad, ordered and paid for second set and after a day using them they had burnt out bulbs or some would take time to heat up...should not happen!!! He said he'd replace them again but I mean come on....after you 4200 or 5200 them on you don't want to be replacing them over and over. I'd never put them on my boat, go with a brand that has a real warranty and is more reputable. If you want the economy route coastal night lights are great for a year or two, but not reliable enough for a serious user. Perko's look ok but are not as bright as competators but price is nice. Also keep in mind, leds are going to draw way less then a halogen so unless you have a generator led is the only option for you. The Ocean LED amphibians aren;t bad for the money, the A3 is worthless, A6 isnt bad, A12 is decent. A thru hull light will give the best light but costs more and many are hesitant with drilling into a hull. On a single engine boat, 2 lights are enoughabout 1 ft below the water. On twins, 2 will be OK...but down the middle you will have a void, ideally you want 1 outside each engine, and one lower down in the center to shine between each engine for a full spread of light. One of my buddies with the coastal night lights had twins with only 2 lights...personally it looked bad....he added a third, looked much better, except now 1/2 the light are out.... And one sides brighter then the other...so it looks crappy again. Abyss also makes a great light and have some surface mounted ones. For quality and money that would be one on my list. Have heard few issues and the ones who have had new ones replaced in no time at no cost and no hassles. Ocean LED is good but expensive for what you get...your paying for the name.