Thanks, Cliff. That tells me more than the lumen
rating. It looked very bright when you dunked it in the swimming
pool.
Jim
In a message dated 1/17/2012 9:08:45 A.M. Central Standard Time,
cliffordredus@sbcglobal.net writes:
Jim, the manufacture does not publish the luminosity of the LED. Their reasons
are given at their web site as:
"q. Why doesn’t Lumitec have any published Lumen information?
a. Our research indicates that lumen data as published by many lighting
suppliers is grossly inaccurate, or at best misleading. To accurately
ascertain this information one needs to conduct careful testing using
sophisticated equipment. In lieu of this, many companies generate lumen
‘approximations’ by simply adding the lumen output published by emitter
manufacturers. Unfortunately, this data usually yields approximations which
are significantly overstated. The reason is that the initial emitter output
data is generated in a laboratory, with a junction temp of 25C, at a pulse of
about 20 mS. This emitter lumen output information is really only useful for
comparing one emitter to another. Moreover, this ‘hypothetical’ lumen data is
typically not derated for reduction of luminous efficiency due to heat,
optics, windows, elevated drive currents, etc.
Naturally, it is not our policy to knowingly publish incorrect
information. Therefore, we prefer to compare our lights to alternate light
sources. For example, our SeaBlaze3 underwater light is brighter than most
lights in its class, and usually outperforms lights priced 2 to 3 times more.
Our Caprera and Capri lights are excellent replacements for the typical 55W
halogen flood lights. These comparisons can be seen in our side-by-side
photographic comparisons in the “products” section of our web site.
All I know is they are bright compared to Deepsea Power and Light halogen
Mini SeaLite (MSL-1070-B-120/250) http://www.deepsea.com/pdf/specs/18_Mini-SeaLite.pdf I
have on my R300. These are rated at 4750 lumens
each. Cliff
From: "JimToddPsub@aol.com"
<JimToddPsub@aol.com> To: personal_submersibles@psubs.org
Sent: Monday, January 16,
2012 11:32 PM Subject: Re:
[PSUBS-MAILIST] SeaBlaze3 LED bench test
Cliff,
For comparison's sake, do you know the lumen rating on the
SeaBlaze3?
Thanks,
Jim T
In a message dated 1/16/2012 9:44:00 P.M. Central Standard Time,
cliffordredus@sbcglobal.net writes:
Hugh, correction, the link I sent was for the green LED.
The one I got was white.
From: Cliff Redus
<cliffordredus@sbcglobal.net> To: "personal_submersibles@psubs.org"
<personal_submersibles@psubs.org> Sent: Monday, January 16, 2012 8:39
PM Subject: Re:
[PSUBS-MAILIST] SeaBlaze3 LED bench test
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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