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Custom Underwater Lights.

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Topic author Canada
Midnightsun
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Vessel Info: The Midnight Sun
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Re: Custom Underwater Lights.

Postby Midnightsun » May 11th, 2018, 6:30 am

After a season of successful testing in the water, I MAY make a small batch exclusively for Carver owners on this site. :down:
Cheers, Hans
2007 Carver 41 CMY
Twin Volvo D6-370's
Montreal, Canada
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waybomb
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Re: Custom Underwater Lights.

Postby waybomb » May 11th, 2018, 8:25 am

And I may be interested Hans.
Thanks
Fred
1969 Glaspar Avalon /1969 Johnson Electromatic 85
1987 Carver Mariner
1988 Cougar Kevlar 46' with triple blown 572 ci
1995 Boston Whaler Rage
Past - 1988 2807, 1989 4207 Aft

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tomschauer
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Re: Custom Underwater Lights.

Postby tomschauer » May 14th, 2018, 8:11 pm

Sign me up.
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Topic author Canada
Midnightsun
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Vessel Info: The Midnight Sun
2007 41CMY
Volvo D6-370's
Location: Montreal, Canada
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Re: Custom Underwater Lights.

Postby Midnightsun » July 7th, 2021, 12:03 pm

After 3 seasons there are issues. Corrosion of the aluminum due to them acting as anodes and the resin has cracked most likely from different expansion rates of materials. On to plan 2.

Image
Cheers, Hans
2007 Carver 41 CMY
Twin Volvo D6-370's
Montreal, Canada
Midnight Sun I Photos
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Re: Custom Underwater Lights.

Postby km1125 » July 7th, 2021, 12:30 pm

How were the LED modules fixed/mounted inside? Was it possible for them to use the aluminum as a heat sink?

A voltage regulator is probably a good idea. Even if the lights could tolerate the higher voltage, that also means more heat. More heat leads to a lot of other bad things happening.
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Topic author Canada
Midnightsun
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Posts: 2824
Joined: March 27th, 2016, 2:27 pm
Vessel Info: The Midnight Sun
2007 41CMY
Volvo D6-370's
Location: Montreal, Canada
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Re: Custom Underwater Lights.

Postby Midnightsun » July 7th, 2021, 12:35 pm

They were mounted with special white heat transfer paste/glue directly to the aluminum housing and then resin poured to seal everything. I know the cooling worked well as I once forgot them on for about 20hrs with no damage.
Cheers, Hans
2007 Carver 41 CMY
Twin Volvo D6-370's
Montreal, Canada
Midnight Sun I Photos

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Re: Custom Underwater Lights.

Postby Viper » July 9th, 2021, 8:08 pm

Midnightsun wrote:Source of the post.... Corrosion of the aluminum due to them acting as anodes....
Ya it's inevitable. Even expensive units have the same problem. There was a thread a few years ago about aluminum underwater lights to which I suggested it wasn't a good idea for that reason but the OP was convinced they'd be fine. I know the boat and know that the lights on there now aren't the ones mentioned in the thread that he first installed. I suspect the corrosion got out of hand so he replaced them with something else. Don't get me wrong, there are aluminum alloys that do pretty good but you can't get away from aluminum being more active than the metals of inboard running gear. If you're going with aluminum, you better have some magnesium close by. If you know the composition of the aluminum, you may also be able to get away with aluminum anodes. Having said that, it's just safer to stay away from aluminum underwater lights IMO, I haven't seen one yet that doesn't eventually corrode to a point where it needs replacing.

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