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Author Topic: Lamdalights 4D Mag Hydra with a Twist---*6,000 lumens*  (Read 15800 times)
bigchelis
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« on: July 26, 2011, 01:08:25 PM »

Hello all,


I been seing those XM-L Hydra lights that Kevin has been putting up for sale.  They are super nice and how can you make anything better than that right???

I asked Kevin to make me a Hydra but brighter.  Here is what we came up with:

3 SST-90 Cool White Emitters
Each one Driven at full Power
Direct Drive because it will allow for more heatsink copper in there
4 NiMH D cells by Tenergy will be used
LED to Copper bonding
80watts is the goal
6000K lumens is the goal

The build is progress...Hope you dont mind me sharing these pictures Kevin, but the copper is massive and you did an outstanding job.  3x the heatsink a normal VARA2000 uses Cheesy





« Last Edit: July 26, 2011, 03:12:45 PM by bigchelis » Logged
bigchelis
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« Reply #1 on: July 26, 2011, 01:22:51 PM »

Kevin can explain the board details and why we went with 4 NiMH D cells instead.



bigC
« Last Edit: July 26, 2011, 03:11:32 PM by bigchelis » Logged
lumenary
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Honorary fleshogolik:)


« Reply #2 on: July 27, 2011, 02:19:42 AM »

liquid gas cooled?
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my two lumens
nightcrawler
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« Reply #3 on: July 27, 2011, 07:23:31 PM »

liquid gas cooled?

I still think someone needs to experiment with a micro-sized Sterling engine in a flashlight...to harvest some of the heat and return it to the LED to lengthen battery life. There are companies that are developing these for LED lighting applications.
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Lambda
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« Reply #4 on: July 28, 2011, 03:53:03 PM »

No Sterling here, but we have FET:



This will use a N channel FET to switch the LED to ground when the FET gate is switched to V+ by the stock switch. Only a few micro amps will flow through the switch. The LED current will pass through the FET.

The head had to have a lot it's inside removed to make room for the heatsink. The heatsink weighs in at 17.1 ounces (1 pound 1.1 ounce) so plenty of copper survived after the drilling and milling.



All the parts are finally finished, washed and in the dryer, batteries in the charger. Final assembly will start shortly...
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gswitter
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« Reply #5 on: July 28, 2011, 10:05:08 PM »

The heatsink weighs in at 17.1 ounces (1 pound 1.1 ounce)...

Wow!

Sounds like we'll need to organize another hike for next month, Jose.
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bigchelis
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« Reply #6 on: July 29, 2011, 10:05:19 AM »

Kevin,
Wow..wow...wow.  that heatsink looks even more impressive on the 4D Mag body.  It looks like you used Car Alternator cables grin  Cant thank you enough for all the work and dedication you put into these crazy ideas I come up with.  Hopefully this will be the brightest LED you have put together.


Gswitter,
I agree.  I thought it would be in my hands by today, but the copper took longer then it should.  We can organize another night hike for sure.  We should have great weather here for another 2 months at least, so no excusses.  Plus; at this night hike its mostly flat for people to show off some throw lights.

Jose
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Lambda
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« Reply #7 on: July 30, 2011, 05:38:27 AM »

Finished the Red beast!

Yes, there were a few beads of sweat on my forehead when soldering the 3 SST-90 to the heatsink. But, everything went just fine and resulted in the first tri-power SST-90 direct to copper mounting.

So, without further delay, here are the beam shots.

For comparison purposes, here's the Hyrda with three XML:




And here is the Red beast Hydra with three SST-90:




Note how the grand kids left plenty of colorful objects laying around to judge color rendition by...

On the bench it clocks in just over 22,000 lux at one meter; not bad for a floodlight.  cool

The pine trees in the distance are a good 100 yards away, so it does have some throw.

The only way I can think to describe the light output would be hand held stadium lighting. This one really has the giggle factor to it; you can't turn it on without grinning.

I'll get this boxed up and on its way soon, but might just have to do another night of 'testing' before shipping.
« Last Edit: July 30, 2011, 05:58:22 AM by Lambda » Logged
gearhounds
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« Reply #8 on: July 30, 2011, 07:27:19 AM »

No fair doing your beamshots with a magnesium fire behind you! That is one serious wall of light!
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lumenary
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« Reply #9 on: July 30, 2011, 07:38:50 PM »

 :respect:
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my two lumens
hron61
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« Reply #10 on: July 30, 2011, 09:37:31 PM »

wow...
this is too much. i would love to add this to my lambda collection. any chance i can purchase this beast.. i mean beauty if it comes up for sale? as in first dibs?  wink
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bigchelis
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« Reply #11 on: July 31, 2011, 12:24:15 AM »

wow...
this is too much. i would love to add this to my lambda collection. any chance i can purchase this beast.. i mean beauty if it comes up for sale? as in first dibs?  wink

No
Way
Jose tongue
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hron61
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« Reply #12 on: July 31, 2011, 01:50:43 AM »

wow...
this is too much. i would love to add this to my lambda collection. any chance i can purchase this beast.. i mean beauty if it comes up for sale? as in first dibs?  wink

No
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Jose tongue

drats... i forgive your sticky fingers on this one.   wink
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bigchelis
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« Reply #13 on: August 01, 2011, 09:57:20 AM »

I hope to do some beamshoots myself when I get it.

Humm.  now what 6K lumens monster can I use to compare against. evil

Lucky for me plenty of flashaholics in the bay area, CA and I have somebody in mind with a regulated Incandescent 250watt light that claims 6K lumens.

bigC
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Lambda
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« Reply #14 on: August 05, 2011, 05:36:24 AM »

BigC - looking forward to your beamshots.

Forgot to give you the safety briefing - Do Not Look Directly Into Light  grin

hron61 - note that there are two heatsinks in the photos at the beginning of this thread....
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nightcrawler
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« Reply #15 on: August 07, 2011, 10:11:20 PM »

6000 lumens / 80 watts = 75 lumens per watt....

We all know I'm the electrical idiot of the board, but wouldn't a multiple XM-L configuration (I guess, like twelve of 'em, eh?) be more efficient than using three of the SST-90 emitters?

Can I safely conclude that at this point in time, maximum lumen output comes at the cost of less than maximum LED efficiency?
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bigchelis
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« Reply #16 on: August 08, 2011, 11:40:52 AM »

nightcrawler;

The initial goal was 18A, but it ended up being 20 plus amps at the tailcap and looking more like 100 plus watts. crazy crazy

3 SST-90 or 3 of any emitter is a much simplier design to work around.  The beauty of SST-90 is that it can take a bit of extra voltage input where an XM-L due to its low vF is very delicate in that regard.

I might be wrong, but thats why I think you see alot of tripple builds in direct drive mode.  The 4~10 LED builds usually will have drivers unless they are 4~10 SST-90 shocked
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nightcrawler
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« Reply #17 on: August 09, 2011, 03:23:23 AM »

Gotcha, bigc...

I do know that designing any device (even a flashlight) is usually a matter of trade-offs in terms of capacity vs. efficiency, simplicity vs. complexity, and output vs. input, among other issues.

I think I was just struck by the total amount of power being delivered to the SST-90's (in this particular instance) and by the relatively low level of efficiency the design delivers when compared to the state-of-the-art in single LEDs.

And I recognize that a twelve XM-L light would be unwieldy to design and build...but my brain seizes up at the thought of a 100 watt flamethrower with XM-L style efficiency.

Just imagine a flashlight putting out something like 12,000 to 15,000 lumens... :drool1:
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Lambda
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« Reply #18 on: August 09, 2011, 05:42:15 AM »

NC - I dodn't even want to think about reflowing 12 tiny XML on to copper at the same time. I mean, it would have to cure cancer or something like that to go through that craziness.  grin

Actually, if you look at the XML in comparison to the SST-90, not much difference. Remember, the XML is only super efficient at 700mA and below. If you crank it up to just 3 Amps, then very little difference from the SST-90 at 9 Amps. Both LEDs need about 4X more power to output 300% of their rated light.

This is certainly the brightest LED light I've built hands down. It's at the edge of being too bright. Much brighter and you're going to need elevation, like in a helicopter to make use of the light. One thing for sure, there is no night vision left after using this light; I can't even imagine what being on the receiving end is like.  evil

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FlashPilot
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« Reply #19 on: August 17, 2011, 12:00:25 AM »

BigC or Lambda, any updates on this beast yet? Id love to read your review. Are there any problems that are holding you up? I have the hydra in the beam shot comparison photos and it looks anemic compared to that incredible new 90-up creation.
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