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Hi Cliff try again, but it was just one of the
first I came across when I googled.
The thought behind it is that these lights are made for exposure to
elements,
some of them are quite robust, look classy, are cheap, large variety of
angles,
brightness & warmth & also could go down miles if oil
compensated.
Attached is a picture of LED lighting on a ROV that went down
10,000 meters. The fittings that the wires are running through look
plastic.
Regards Alan
---- Original Message -----
Sent: Tuesday, January 17, 2012 4:41
PM
Subject: Re: [PSUBS-MAILIST] SeaBlaze3
LED bench test
Hugh, correction, the link I sent was for the green LED. The
one I got was white.
Hugh, good to hear from you. Hope you have made progress on
your boat since my visit. I ordered the light from
Amazon.com
http://www.amazon.com/Lumitec-SeaBlaze-Underwater-Light-Green/dp/B002UO4XYI/ref=sr_1_6?ie=UTF8&qid=1326767665&sr=8-6
Cliff
Cliff Redus Redus Engineering USA Office: 830-663-6445 USA
mobile: 830-931-1280 cliffordredus@sbcglobal.com
From: Hugh Fulton
<hc.fulton@gmail.com>
To: personal_submersibles@psubs.org
Sent: Monday, January 16,
2012 8:17 PM
Subject: RE:
[PSUBS-MAILIST] SeaBlaze3 LED bench test
Hi
Cliff, That is a great light and I would like ot get hold of one
and make a housing. Did you just buy from the website or did you find
another source? Best regards,
Hugh
From:
owner-personal_submersibles@psubs.org
[mailto:owner-personal_submersibles@psubs.org] On Behalf Of
ojaivalleybeefarm @dslextreme.com
Sent: Tuesday, 17 January 2012
2:48 p.m.
To: personal_submersibles@psubs.org
Subject: Re:
[PSUBS-MAILIST] SeaBlaze3 LED bench test
Hi Cliff, Maybe you could
fill it with mineral oil. Fast turn around on your video
!
Psub postings have been a
bit slow so I have decided to post a short test I did today on an off the
shelf LED light. Subsea lights are very expensive for psub applications
so I was looking to see what kind of depth performance I could get with an
off-the-shelf LED marine light for pleasure boats. I chose to test the
Lumitec SeaBlaze3. See the YouTube clip of the test at
http://youtu.be/WXYPjIgoxLE . Prior to
the test, I took it to swimming pool to see how it worked at night. The light
worked great and very bright. You could see across a an Olympic sized
swimming pool without any problem with just one of these lights. The
application I am contemplating would use seven of these lights working off 24
VDC. The lights will work on 10-30 VDC. For 24 VDC, they pull 1.1
amps. To conduct the test, I built a pressure chamber out of 4
inch, schedule 40 galvanized pipe fittings. I then made up a simple electrical
penetrator using a ¾ inch pipe fitting, nails and some two-part epoxy.
To pressurize the test chamber, I used my pressure washer with a bypass
valve. To determine when the unit failed, I connected the light through
the DC current section of my multimeter. Because the line pressure for
my house during the test was 74 psig, this is the minimum pressure point for
the test.
Results were that the LED
light worked fine for about 4 minutes at 74 psig or 167 fsw. At that
point, the case flooded. The application I am looking at has a 500 fsw
design depth with a max test depth of 625 fsw. Therefore out of the box
these would not work but it would be straight forward to pull the
electronics and LEDS and insert them in a custom 1-atm shell. This
lights was $220.
The reason I
thought this had a chance of handling the pressure was because the case is
anodized aluminum and the lens is glass. The LED face plate was in contact
with the lens so structurally it was being supported. My guess is that
they must have used some kind of adhesive to seal the lens rather than an
o-ring. My next step is to tear the fixture apart and see if the
electronics and LED could be repackaged for pressure.
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