[PSUBS-MAILIST] Lights

[Jon Wallace via Personal_Submersibles]

Alec,

How does the light of both compare to your eyes?  They are both listed 
at about the same lumen output.  The Trustfire uses three 1000 lumen 
CREE led's whereas this floodlight uses sixteen 200 (or so) lumen 
led's.  I realize the trustfire is more of a spotlight but just curious 
how they match up as perceived by your eyes in terms of total light output.

Jon


On 5/14/2014 4:52 AM, James Frankland via Personal_Submersibles wrote:
> Hi Alec,
> Those lights on your link look good.  Let us know how you get on with 
> your test next week, I and im sure others would be interested to know 
> how they perform.
> Thanks
> James
>
> On 13 May 2014 14:02, Alec Smyth via Personal_Submersibles 
> <personal_submersibles at psubs.org 
> <mailto:personal_submersibles at psubs.org>> wrote:
>
>     I used Trustfire lights for a season on Snoopy but the experience
>     was all around bad. I bought two, one of which did not work due to
>     a faulty connection at the endcap (which acts like a switch). The
>     factory shipped me a new end-cap that fixed the problem. In fresh
>     water they worked well, but when I went to Islamorada last year
>     they lasted less than a day in the salt water. After just hours,
>     one stopped working altogether and both lights were very visibly
>     corroded. Silly me, I hadn't thought this through. The Trustfire
>     lights close the circuit when you screw in the endcap on the
>     handle. They use the light body itself as a conductor, like a car
>     uses its chassis. I think the issue is that if you put two such
>     lights in salt water, you will get stray currents between them.
>
>     On next week's dive I'll be testing new lights, which are LED
>     flood lights intended for tractors or off road vehicles. I've been
>     really impressed with how solid these are. They are wired with two
>     cables, rather than using the light body as a ground. Second, they
>     have a little screw that serves no visible purpose, but which when
>     removed allows you to fill them with mineral oil. It took a while
>     to get the last bubbles out, but with patience you can fill these
>     with oil and remove all bubbles in about an hour. The front
>     plastic has a little give to absorb the compression if I have any
>     bubbles left, but I think I have none. To fill them I used a
>     syringe with a "dispenser needle" which is a blunt syringe needle
>     you use for filling things rather than giving someone an
>     injection. The lights are IP67, so supposedly water-tight, but my
>     only mod was to reinforce the cable gland with some epoxy. We
>     shall see how they work, but my hopes are up, I think these might
>     finally be the ideal sub lights and can be used virtually off the
>     shelf. I recommend not buying them until Snoopy returns from next
>     week's dive, but here is the link if you want to take a look in
>     the meantime.
>
>     http://www.surpluscenter.com/Electrical/Lights/DC-Mobile-Equipment-Lights/12-24-VDC-3120-LUMEN-16-LED-UTILITY-FLOOD-LIGHT-12-999-B.axd
>
>
>     Best,
>
>     Alec
>

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