Shocking MBY underwater light fitting video

[Deleted User YDKXO]

Doesn't MBY know that the only forum approved underwater light is Lumishore?

https://www.youtube.com/watch?v=4IApFLcsmOo

Btw does anyone know why the Lumishores were being replaced with Ocean lights in the vid?

 

[daveyw]

Is that transom wood? Do they not apply some sort of resin to the cut surfaces? Is that narrow beam normal or can they be wider?

 

[Portofino]

There's so much clutter allready hanging off the back of that boat ,maybe it would have been better to attach some other light system externally to save drilling holes.
Having done that -the holes - then as above I would be inclined if a wood core to glass over the wood as well as gobb up with sealant .
Anyhow if folks insist on drilling holes then the design of this , with the removable insert and adjustable collar is great .
They did look a bit dull in that light not particulary impressive , but hey ho !

For me the jurys still out on underwater lights that involve drilling and add to bat drainage .

Ideally a solar charged lighting that you can simply hang over the side and move around even drop deeper @ anchor etc .

 

[bendyone]

Over £1000 a light, must send a note to Santa or my Shrink. :encouragement:

 

[vas]

blimey,

so they removed some surface mounted lights, not lumishores (I think!) with a 15-20mm hole for the cable (compared to a 8mm iirc for the lumishores) to fit a big massive thing that needs a 70odd mm hole???
Argument is that you can replace the light without pulling the boat out, pardon?
Is a uwl a life or death issue and you cannot live without hence cannot wait for next lift?

sorry not very serious...

cheers

V.

 

[MapisM]

Never mind the big and badly sealed holes, folks.
Looking at the sort of electrical conduit they used (4:10 onward), the thing is likely to go on fire well before the transom will rot.
Watch out for the next video, that's bound to be more peculiar... :ambivalence:

 

[petem]

Never mind the big and badly sealed holes, folks.
Looking at the sort of electrical conduit they used (4:10 onward), the thing is likely to go on fire well before the transom will rot.
Watch out for the next video, that's bound to be more peculiar... :ambivalence:

What was the issue with the wiring P?

I must admit, drilling such large holes under the waterline for something that is cosmetic really does make me wince. What happens if it all fizzes away?

 

[Deleted User YDKXO]

blimey,

so they removed some surface mounted lights, not lumishores (I think!) with a 15-20mm hole for the cable (compared to a 8mm iirc for the lumishores) to fit a big massive thing that needs a 70odd mm hole???
.

The original lights certainly look the same as my Lumishores and yes you're right one of the advantages of the Lumishores is that you dont need a bloody great big hole to fit them. Its a mystery to me why anyone would want to replace their Lumishores with Ocean LEDS which is why I asked the question

 

[benjenbav]

I was surprised by the metal collar inside the hull being used rather than a rubber gasket which I would have thought might offer even more flexibility and superior sealing properties and also be simpler and cheaper to produce and easier to install.

 

[jrudge]

The size of the hole is too big for my liking.

So should the "glass" (crystal or whatever) break there is a lot of water going to come in.

The lumishore way of a smaller hole seems "safer" to me as even in the worst case scenario it is going to be half blocked up with wire.

We had 1 lumishore fail but that was 1 of 4 so waiting to the next lift was hardly critical.

 

[Deleted User YDKXO]

I was surprised by the metal collar inside the hull being used rather than a rubber gasket which I would have thought might offer even more flexibility and superior sealing properties and also be simpler and cheaper to produce and easier to install.

Yes I was surprised too because you would think that there is nowhere near enough flexibility in a metal gasket to seal against a rough grp surface but I guess Ocean know what they're doing

 

[Bandit]

It does remind me why I don't want a load of potential flooding ports fitted in my hull, in northern climes I have never seen the attraction for underwater lights.

I suppose it could be attractive to be able see what is being discharged from a sea toilet at night?

 

[Stats007]

Yes I was surprised too because you would think that there is nowhere near enough flexibility in a metal gasket to seal against a rough grp surface but I guess Ocean know what they're doing

Given there's no sealant on the inside I suspect it's not a gasket at all but just to maintain the integrity of the external seal.

 

[MapisM]

What was the issue with the wiring P?

It's the sort of plastic conduits they used that I don't think is suitable for e/r installation: neither heat resistant nor flame retardant.
At least, they don't appear to be - as opposed to the light grey ones in the pic below, just for comparison.

 

[jrudge]

Depending on the boat that may not be the engine room

On the S65 the engine room for example is well forward of that ( crew cabin and lazarette in the way

J

It's the sort of plastic conduits they used that I don't think is suitable for e/r installation: neither heat resistant nor flame retardant.
At least, they don't appear to be - as opposed to the light grey ones in the pic below, just for comparison.

 

[Nick_H]

The size of the hole is too big for my liking.

So should the "glass" (crystal or whatever) break there is a lot of water going to come in.

The lumishore way of a smaller hole seems "safer" to me as even in the worst case scenario it is going to be half blocked up with wire.

The smaller holes isn't "the Lumishore way", it's just the difference between surface-mount lights and through-hull lights. Lumishore make both types, and I imagine Ocean do as well. Obviously the through hull lights by either manufacturer can be more powerful, because there is much more space for bigger LED's or capacitors or heat sinks or whatever it is that's needed to make very bright LED's.

 

[Deleted User YDKXO]

The smaller holes isn't "the Lumishore way", it's just the difference between surface-mount lights and through-hull lights. Lumishore make both types, and I imagine Ocean do as well. Obviously the through hull lights by either manufacturer can be more powerful, because there is much more space for bigger LED's or capacitors or heat sinks or whatever it is that's needed to make very bright LED's.

Maybe I'm wrong but isn't the USP of the Lumishore light that it gives the brightness of a through hull light in a surface mount one although I see that Lumishore do a through hull one now? Just checked the Ocean website and it seems they've just introduced a surface mount light too. Bloody confusing!

 

[jfm]

The video was odd. The first boat with black antifoul and triple Bennett cylinders was GRP and had the smallest Lumishores (that i have on my tender!), but then they drilled a hole in an apparently wooden boat with BLUE antifoul with twin bennetts. Different boats, so those Lumishores weren't replaced at all. Then the movie flipped to the inside of a GRP boat. Then the shots near the end with the boat in the water, with lights turned on, was of a boat WITHOUT a hilo platform, so that's yet another boat. Continuity was all over the place.

A few other things:

The metal ring wasn't a "seal" and nor was the nut; Mendez was wrong in his description. The only seal in that video was the 3m 4000.

The concept of using a polo-mint shaped ring and set screws running through the nut (to allow for uneven inner hull surfaces) is perfectly ok but it was invented perhaps a thousand years ago, so it was odd that Jon Mendez raved about it so much.

Like Vas, I don't get the "massive advantage" of swapping the lights out without lifting the boat.

I thought the cable trunking was ok. It was in the rudder compartment.

The choice of lights these days is (i) surface mount like the lumishore at beginning of video on the black antifouled boat, where only a 8-10mm hole for the cable is needed, (ii) "interchangeables" like in the video where you need a 70mm or so hole in the hull, and (iii) "through hulls" where the light is like a mushroom and a 25mm or so hole is needed for the mushroom stalk and you have a huge area for the sealant to work (I have these). i think most of the bigger manufacturers make all three types

Incidentally, because we were talking about it on another thread, OceanLED went bust (administrator appointed 2014) and did a prepack, so the OceanLED firm of today is the result of that prepack. Nice.

As you can see, those OceanLEDs had a narrow beam. Basically, if the light fixture doesn't make a lot of light you need to focus it into a narrow beam (using a lens) to get any slightly impressive level of brightness. There isn't much point trying to spread something widely when you haven't got a lot of it. That particular light is claimed by OceanLED to produce 8500 fixture lumens.

If you make lots of lumens to begin with you can have brightness AND a wide beam, but for that you need Lumishore - their equivalent model makes 15,500 fixture lumens (actually measured, for every light that goes out of their door, using a proper integrating sphere) and you get this...

 

[jfm]

Here's a quick drone vid of Lumishore's latest for the boat size typical on here. Apart from the girls swimming scene which has their 2014 model, this vid shows their 2016 RGBW (rather than RGB) lights @15,500 lumens each.

 

[alt]

jfm - Does that intensity of light attract any marine life / fish at night? Can only imagine how fun it would be.

Reminds me of Thailand - at night looking out to sea, as far as the eye can see was the green glow of fishermen 'lamping'