Underwater Lights
Underwater Lights
2004 220
So its well below freezing and I'm thinking about underwater lights on the boat this spring. I'm going to have someone else do it because I can't trust myself to drill the hole correctly UNDER the waterline. Can someone tell me about underwater light BRANDS and the advantages before I begin this project. How do I change colors? What brand does Cobalt use?
Thanks
viewtopic.php?t=5206&sid=cb14bcc5e96581 ... fd62978139
So its well below freezing and I'm thinking about underwater lights on the boat this spring. I'm going to have someone else do it because I can't trust myself to drill the hole correctly UNDER the waterline. Can someone tell me about underwater light BRANDS and the advantages before I begin this project. How do I change colors? What brand does Cobalt use?
Thanks
viewtopic.php?t=5206&sid=cb14bcc5e96581 ... fd62978139
2004 220
Re: Underwater Lights
1st page of my thread viewtopic.php?t=4953
Ignore the last 4 pages of my thread that got majorly hijacked.
Ignore the last 4 pages of my thread that got majorly hijacked.
2017 R5 350HP Mercruiser Bravo III
Northridge, CA
Big Bear Lake, CA
South Lake Tahoe, CA
Northridge, CA
Big Bear Lake, CA
South Lake Tahoe, CA
- Krob1114
- Vice Admiral

- Posts: 1876
- Joined: Sun Jun 09, 2019 8:03 am
- Location: Greer’s Ferry Lake, AR
- Contact:
Re: Underwater Lights
There's a thread somewhere on here about an underwater light that is treaded and just goes into the back drain plug. The only thing you have to do is figure out how to wire it. If we go with lights, I'll probably try this method. You can still use the plug, it just hangs down when draining the bilge.
I think I found it:
viewtopic.php?p=63215&hilit=underwater+lights#p63215
I think I found it:
viewtopic.php?p=63215&hilit=underwater+lights#p63215
2019 Cobalt R3 @ Greers Ferry Lake, AR
Home in Hernando, MS
Home in Hernando, MS
- Big Block Power
- Fleet Admiral

- Posts: 17930
- Joined: Sat May 07, 2016 8:05 pm
- Location: Neenah,Wi
- Contact:
Re: Underwater Lights
The picture in the link you attached is a Diablo drain plug. Like I said I wish it was darker outside to get the full effect. Sea blaze makes real nice lights.SAB220 wrote: Thu Jan 13, 2022 4:59 pm 2004 220
So its well below freezing and I'm thinking about underwater lights on the boat this spring. I'm going to have someone else do it because I can't trust myself to drill the hole correctly UNDER the waterline. Can someone tell me about underwater light BRANDS and the advantages before I begin this project. How do I change colors? What brand does Cobalt use?
Thanks
viewtopic.php?t=5206&sid=cb14bcc5e96581 ... fd62978139
I went through Bruce's build thread I missed the highjack. It all looked good. It's a great thread though.
03Cobalt220 8.1gxi DP
"Kids in Tow2"
"Pot The Jus" Originator :-)
Neenah Wi
#ItsBu'sfault
#FARCON Marine CC Core!
"Kids in Tow2"
"Pot The Jus" Originator :-)
Neenah Wi
#ItsBu'sfault
#FARCON Marine CC Core!
-
tbully
- Captain

- Posts: 200
- Joined: Fri Mar 16, 2018 11:51 am
- Location: Canton, MI
- Has thanked: 1 time
- Contact:
Re: Underwater Lights
OceanLED is what Cobalt put in my R7 - specifically the "Sport" line.
I'm looking at switching out my entire system (inside and underwater) to Shadow-Caster to allow control from one location (Garmin, app, etc). I just need to see if the mounting holes line up because I don't want to re-drill holes. I think they will.....
I'm looking at switching out my entire system (inside and underwater) to Shadow-Caster to allow control from one location (Garmin, app, etc). I just need to see if the mounting holes line up because I don't want to re-drill holes. I think they will.....
2017 R7 6.0 430 VP
2019 R7 6.2 430 VP
2019 R7 6.2 430 VP
Re: Underwater Lights
Thanks for the threads. I'm going with the RWBG Lumitec Seablaze X2 lights. Lumitec says if you want dimmer you have to find a aftermarket one. Looking at these threads also begs the question about swim platform lights. More money.
2004 220
Re: Underwater Lights
I love my Seablaze X2. I just have the Blue/white ones. Work fine for how I use my boat.SAB220 wrote: Fri Jan 14, 2022 1:07 pm Thanks for the threads. I'm going with the RWBG Lumitec Seablaze X2 lights. Lumitec says if you want dimmer you have to find a aftermarket one. Looking at these threads also begs the question about swim platform lights. More money.
I bought some of these for my swim platform lights.
https://www.oznium.com/led-bolts-prewired-leds/led-bolt
I used the stainless steel 11mm ones in a warm color.
You do not have the required permissions to view the files attached to this post.
2017 R5 350HP Mercruiser Bravo III
Northridge, CA
Big Bear Lake, CA
South Lake Tahoe, CA
Northridge, CA
Big Bear Lake, CA
South Lake Tahoe, CA
Re: Underwater Lights
I also put in a timer circuit so that with a quick on/off of the power switch, the swim platform lights will stay on for 10 minutes. You can set the timer chip to whatever delay you want. I have another timer for my interior lights. I also put in a momentary switch that will turn both the interior and the swimstep lights on for 10 minutes.
2017 R5 350HP Mercruiser Bravo III
Northridge, CA
Big Bear Lake, CA
South Lake Tahoe, CA
Northridge, CA
Big Bear Lake, CA
South Lake Tahoe, CA
-
Lifelongbtr
- Captain

- Posts: 222
- Joined: Sun May 23, 2021 6:53 pm
- Contact:
Re: Underwater Lights
Very nice. I'd use that a lot.bruceb58 wrote: Fri Jan 14, 2022 2:32 pm I also put in a timer circuit so that with a quick on/off of the power switch, the swim platform lights will stay on for 10 minutes. You can set the timer chip to whatever delay you want. I have another timer for my interior lights. I also put in a momentary switch that will turn both the interior and the swimstep lights on for 10 minutes.
Re: Underwater Lights
Curious on the Plug Lights. Do you worry about wires coiling when screwing in the plug? Or can you turn plug counter clock wise before inserting to offset the coiling?
1995 252 7.4L 300HP
- Big Block Power
- Fleet Admiral

- Posts: 17930
- Joined: Sat May 07, 2016 8:05 pm
- Location: Neenah,Wi
- Contact:
Re: Underwater Lights
Mine has a tiny drain plug built in it. So you don't have that issue. My last one didn't and that wasn't a big deal either but the cheap light sucked and that's why I bought the expensive one.sming250r wrote: Thu Jan 20, 2022 9:54 pm Curious on the Plug Lights. Do you worry about wires coiling when screwing in the plug? Or can you turn plug counter clock wise before inserting to offset the coiling?
03Cobalt220 8.1gxi DP
"Kids in Tow2"
"Pot The Jus" Originator :-)
Neenah Wi
#ItsBu'sfault
#FARCON Marine CC Core!
"Kids in Tow2"
"Pot The Jus" Originator :-)
Neenah Wi
#ItsBu'sfault
#FARCON Marine CC Core!
Re: Underwater Lights
Ya spoke to the Marine electrician, UW lights scheduled this spring as as soon as the shrink wrap comes off and the snow in front of the trailer melts. Drill Drill Drill
2004 220
Re: Underwater Lights
I must've missed it somewhere. What light did you end up going with for your drain plug light?Big Block Power wrote: Fri Jan 21, 2022 6:51 amMine has a tiny drain plug built in it. So you don't have that issue. My last one didn't and that wasn't a big deal either but the cheap light sucked and that's why I bought the expensive one.sming250r wrote: Thu Jan 20, 2022 9:54 pm Curious on the Plug Lights. Do you worry about wires coiling when screwing in the plug? Or can you turn plug counter clock wise before inserting to offset the coiling?
1995 252 7.4L 300HP
- Big Block Power
- Fleet Admiral

- Posts: 17930
- Joined: Sat May 07, 2016 8:05 pm
- Location: Neenah,Wi
- Contact:
Re: Underwater Lights
Expensive Diablo drain plug light.sming250r wrote: Fri Jan 21, 2022 1:12 pmI must've missed it somewhere. What light did you end up going with for your drain plug light?Big Block Power wrote: Fri Jan 21, 2022 6:51 amMine has a tiny drain plug built in it. So you don't have that issue. My last one didn't and that wasn't a big deal either but the cheap light sucked and that's why I bought the expensive one.sming250r wrote: Thu Jan 20, 2022 9:54 pm Curious on the Plug Lights. Do you worry about wires coiling when screwing in the plug? Or can you turn plug counter clock wise before inserting to offset the coiling?
03Cobalt220 8.1gxi DP
"Kids in Tow2"
"Pot The Jus" Originator :-)
Neenah Wi
#ItsBu'sfault
#FARCON Marine CC Core!
"Kids in Tow2"
"Pot The Jus" Originator :-)
Neenah Wi
#ItsBu'sfault
#FARCON Marine CC Core!
Re: Underwater Lights
IMO the boat drain plug has, and should have, only has one function,.....
2004 220
Who is online
Users browsing this forum: No registered users and 2 guests
