Worklight comparison: 400W LED vs 500Wx2 Halogen

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leaftye
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I’m having a hard time finding a good deal on the same driver that’s in this light though, so I’m thinking about going a different route. I have my eye on a led driver that outputs 200 watts at 171-286 volts. The cob leds are supposed to get 30-36 volts. What if I ran 2-4 of these drivers in parallel to 8 of these leds in series? Electrically I don’t see an issue with it. If I’m not missing anything, I’ll start ordering parts. It’d be insane to actually have this thing put out 80 thousand lumens. I’d seriously have to get a dimmer put on that.

The low mode should be lower.

Reviews: Efan IMR18350 700mAh 10.5A, <a href="http://

Barkuti
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Namely, what driver? Specs? Chinese watts or real watts?

If those are 100W cheap COBs, we're technically speaking about 10S10P emitters, with relatively high Vf if driven hard.

I've been using this driver operating reliably a 30S4P 5730 array for nearly 8 months now: AC 85-265V High Power Supply Driver 25-36x1W for LED Light Lamp 25W 28W 30W 36W @babaoshop

5-piece pack: 5pcs AC 85-265V Power Supply Driver 25-36x1W for LED Light Lamp 25W 28W 30W 36W @babaoshop

Startup Vf measured at ≈105V for that 30S4P setup.

These drivers may be able to drive 4S COBs (may reach around 150V, as said by some guy at FastTech), yet that would be “pushing it”, out of spec.

Ten of 'em in parallel would drive 3S of those COBs at maximum driving current (300W real watts). That heatsink would start getting hot Steve . Should be able to operate in parallel without issues, yet if not the solution is cheeap and easy: an 1N4007 in series at each driver's output.

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leaftye
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http://www.ebay.com/itm/Autec-Power-Systems-LSWCD200S070ST-200W-LED-Driver-171-286V-0-7A-/391590779984

American company out of California. Probably manufactured in China.

Data sheet here.
http://www.autec.com/pdf/LSWCD200.pdf

It even shows how to wire up a dimmer, which sounds like a damn good idea with the lumens and heat this thing will generate. The size may be too big to fit 4 in my light.

Edit: I ordered some. I should try to find a way to put a handle and battery pack on this to make the brightest flashlight. It’ll probably weigh a hundred pounds.

The low mode should be lower.

Reviews: Efan IMR18350 700mAh 10.5A, <a href="http://

keltex78
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My testing with cheap 100W AC drivers for these ultra-cheap “100W” COB emitters has been poor. It’s been about a year since I got to play with them, but it should be fairly easy to get them up to 75-80W/emitter, which should boost your output significantly. I had purchased a few of the cheap 100W COBs and a few drivers that had the correct specifications and none of them would run even close to the rated wattage, and the actual power consumption at the wall varied significantly between the different emitter packages I was using.

Of course, 80W*4 would be dumping a huge amount of heat into that passive “heatsink” surface. I know that a single emitter running at full power would fully saturate the Intel CPU heatsink I was using for a testing platform and have it baking hot in moments… I would expect (gut feeling only) that running anywhere close to full spec with that light package would overheat in a very short while, after all, it’s the power of a small desktop space heater in an enclosed space, without the benefit of air moving through it…

Why is the cool-white version $170 vs the $98 of the warm white? Sad


Keepin’ the “B” in BLF

Don wrote:
It sounds like the XM LEDs won’t really be suitable for flashlight use. Pity…

Barkuti
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That 0,7A Autec driver looks good, leaftye.

Also, since you'll be running drivers in parallel, you can arrange on/off switches at the drivers' inputs for sort of a coarse grained variable driving current system, in 0,7A steps (0,7/1,4/2,1/2,8A).

Going 8S COBs? Well, good luck with that, such an array may want close or above 300V when driven hard. Good luck with cooling that furnace, too. LoL. LOL  

 

Cheers Party

Deleting a post and redoing it causes the forum thread answer notifications to become invalid. Thus, if you need to change your just published post, edit it. Thanks.

Please avoid quoting lenghty posts, namely with nested quotes. Trim the quote down to the essential. Helps with forum neatness and legibility. Thanks.

Localized AliExpress links mess up with the language setting of whoever clicks or taps on them. While this is a fault of the AliExpress system, turning localized links into global links helps and is easy; just change the locale letters in the url for www. Example:

https://es.aliexpress.com/item/bla-bla-bla.html turns into https://www.aliexpress.com/item/bla-bla-bla.html. Thumbs Up

leaftye
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8S seems nuts. Hopefully only the COBs fry if I release the smoke.

The low mode should be lower.

Reviews: Efan IMR18350 700mAh 10.5A, <a href="http://

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