"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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