[PSUBS-MAILIST] LED recommendations

Sat Sep 2 21:52:04 EDT 2017

Alan I have ordered two  of the drivers and will do some bench testing.
With my AGM batteries after a full charge I am setting at about 38.5-39V.
The LED driver has a soft start so when my four other LED come on, the
battery voltage will be pull down so I am thinking I will be close but
ok. I will let you know how the test come out.

Regards

Cliff

On Sat, Sep 2, 2017 at 5:37 PM, Alan via Personal_Submersibles <
personal_submersibles at psubs.org> wrote:

> Cliff,
> did Emile say he was running this driver off 24V?
> It says in the user manual....
>
>    1.
>
>    )  Connect the power supply.
>    It is important to ensure that the input voltage <= Total-Led voltage.
>    (Boost-principle). If not the LED(s) get to much voltage and can damage!
>
>    You may be pushing the limits if your led output voltage is set at 38V
>    & your input
>
>    voltage is 40V.  I have read in other step up manuals that there
>    needed to be a 2V boost difference. ie If your input was 36V your
>    output needed to be 38V. I am not sure
>
>    what will happen if your input is above the output setting. Perhaps it
>    will bump the
>
>    output up by 2V above the input.
>
>    Can you email the manufacturer & ask them if it would be suitable for
>    our application?
>
>    Having said that; on a 36V battery bank the charge will settle down to
>    below 40V in time.
>
>    This is just the problem that I spent ages googling to try & find an
>    answer for.
>
>    The 36V system is just in the wrong range for these 36V LEDs.
>
>
>    Cheers Alan
>
>       I
>
>
> Sent from my iPad
>
> On 2/09/2017, at 11:59 PM, Cliff Redus via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
> Emile's email got me back on the Psubs 10K LED light project which has
> been on hold waiting for a driver.  This LED driver is perfect for driving
> the 10K lumen Bridgelux LED array we spected.  It will work for 12V, 24V
> and 36V system.  Also because it is so small it enabled me to reduce the
> size of the 1-atm enclosure to 3" diameter x 2.85" long.  In the spirt of
> KISS a custom PCB has been abandoned as well as the provisions for
> dimming. The driver has provisions for dimming but for this installation,
> it is not implemented. With not having a custom PCB we loose the polarity
> and overcurrent protection but the driver has built in overtemperature
> proection.  I have updated the drawings for the light and Jon has uploaded
> them to the PSUBS.org <http://psubs.org> site.  See
> http://www.psubs.org/design/  and click on Lights to download PDF
> drawings including a wiring diagram.  I completed an FEA analysis and the
> enclosure should be good for 1000m.  At this point we need to build one of
> the lights as a prototype and test.  I have a test chamber I can use to
> test the light.  I am thinking about fabricating one of the lights for the
> bow of my boat but I have to figure out where to mount it and how to get
> power to it.
>
> This is a draft set of drawings.  Comments/suggestions welcome.
>
> Regards
>
> Cliff
>
> On Mon, Aug 28, 2017 at 3:07 AM, emile via Personal_Submersibles <
> personal_submersibles at psubs.org> wrote:
>
>> Hi Jon,
>>
>> The Pilotfish team and me  developed a UW LED lamp. Since the Norway
>> expedition on my sub. So happy with it that I like to recommend it.
>> It is a Bridgelux Vero 29 unit with 80 Watt (abt. 300 watt Halogen) Wide
>> (90-100 deg) angle but that is okay for a sub. Housing is can go down to
>> 800 M and has a 80 mm OD.
>> Dimmable, I don’t run it at full power.
>> LED driver 6-40 VDC : https://pcb-components.de/led-
>> aufwaertswandler-boost-step-up/led-senser-xtreme-200-2050ma-
>> 6v-30v-detail.html
>>
>>
>> Br, Emile
>>
>> -----Oorspronkelijk bericht-----
>> Van: Personal_Submersibles [mailto:personal_submersibles-
>> bounces at psubs.org] Namens Jon Wallace via Personal_Submersibles
>> Verzonden: maandag 28 augustus 2017 4:29
>> Aan: Personal Submersibles General Discussion
>> Onderwerp: [PSUBS-MAILIST] LED recommendations
>>
>>
>> While we're in the middle of an LED investigation, can those of you
>> actively diving with LED lighting give us a guideline on a range of lumens
>> we should be striving for (per lamp), how many lamps, spot or flood?
>>
>> I know Alec was using an oil-filled 3000 lumen lamp on SNOOPY before
>> selling it.  I've been looking at PRIMELUX 8100 lumen lamp that seems like
>> it could be easily adapted for oil or air compensation.  Generally I would
>> say more light is better but also need to be careful about power
>> consumption so I don't want to purchase more light than is necessary for
>> general operations.
>>
>> Jon
>>
>>
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