[PSUBS-MAILIST] LED recommendations

Mon Aug 28 11:29:40 EDT 2017

Emile, a couple of questions:

*	Are you using the /Bridgelux Vero 29 BXRC-50G10K0-L-24 array, if not what Vero 29 part number?

>> Got them from Antoine. You know the P/n Antoine?

*	On the Sensor Extreme LED driver, are you using the 2050mA factory output current? If not, which factory current? This would match pretty well the 2.1A current draw on the Vero 28 at maximum power.

>max power is even 3 Amps. Funny; if you reduce the voltage with the power supply , the Amps rise.

*	The driver doc says “Maybe you need to cool the driver, attach him if necessarily with an electrically insulating material such as thermal pad on a metal surface/heat sink”.  I don’t see any kind of metal surface on the driver to effectively mechanical/thermally connect this to a heat sink.  In your enclosure, do you use a heat sink on the driver?

>> I attached them in a small alu box with thermal conductive double side tape. Works fine.

*	Is your LED enclosure 1-atm air filled or pressure compensated with oil?  

>> 1 ATM  

*	Are you connecting these directly to a 36V nominal AGM battery bank (30-40V)?  If so, the driver documentation says “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!  If you had a new fully charged 36v bank, the actual voltage would be around 40V.  If the Vero 29 wants 38v, is this an issue?

>> Up to you to test .. I run on  a 24 VDC system.

*	You said that you do not run the light at full power?  Why?

>> No time for a a dimmer and test program.

*	Can you share a picture of the enclosure?

see attachment. Evt  for sale.

*	Can you run these lights out of water?

Ø  To be tested. At this stage  (2 Amps for 2 LEDS) It cam be use out of the water.LED array is mounted with thermal conductive paste.

*	What kind of electrical disconnect to you have on the light enclosure.

>> Blueglobe

*	This looks like a great LED driver. I am considering it for the 10K PSUB light project which is on hold pending finding a LED driver.

>> sure! I run 2 LEDs parallel on one driver . https://www.youtube.com/watch?v=-oc6-9CzQNM&t=390s

·        Emile one more question.  The Sensor Extreme documentation says dimming is controllable with their Led Stripe V4, Nanodim V2 or micro-dim units.  Which of these units if any are you using to dim the LED?  If not one of these units, are you using a PLC to generate the PWM dimming signal?

Ø  I am a mechanical guy.. Now has fixed amps. Will make 3 stages later on.

Best 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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