6,500 lumens portable LED light

Well, this 6,500 lumen light is not exactly a lantern but an area light instead. I heard it runs off 10 D cells. I wonder what kind of LED it uses and how well they handle the heat from 36 of them. Is this the brightest LED light commercially produced - though not on sale yet (not counting exotic multiple LED array I saw somewhere here (is it defabricata?))

10 D cells does not make it that portable. Nor that powerful if each cell has to power 3.6 LEDs each. With each LED at over 180 lumens. If I am doing my math right that is over 648 Lumens per single 1.5V D cell battery! Where did you find that pic? I'd like to read more or see if it is some kind of hoax.

NickBose said:

(not counting exotic multiple LED array I saw somewhere here (is it defabricata?))

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I think you may be thinking of the awesome Data Bank 70.

Let's have some fun, shall we?

http://www.altuslumen.com/Ultra_Pro_led_light.html said:

ULTRA-PRO is the world's first 6,500 Lumen portable battery operated LED Light,

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LIES! The DataBank 70, as saabluster mentioned, exceeds that.

http://www.altuslumen.com/Ultra_Pro_led_light.html said:

because of the latest LED technology, its 90W light source is as bright as the 500W halogen lamp.

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Yeah, that's doable.

http://www.altuslumen.com/Ultra_Pro_led_light.html said:

Just because total weight is less than 5kg, size is as compact as a 15" portable computer, powered by rechargeable battery and water resistant design, ULTRA-PRO is a reliable light for outdoor operation in the darkness.

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5kg is a little heavy for a portable computer (I suppose they mean a laptop), but I don't doubt their ability to measure mass properly.

http://www.altuslumen.com/Ultra_Pro_led_light.html said:

Cyclic
The main housing is made of recycled and recyclable aluminum and polycarbonate.
ULTRA-PRO is over 75% recyclable at the end of its useful life.

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Okay.

http://www.altuslumen.com/Ultra_Pro_led_light.html said:

Efficient
LED is 500% more power efficient and 10 times more durable than halogen lamp.

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Once again, doable.

http://www.altuslumen.com/Ultra_Pro_led_light.html said:

Multiple level output, durable and water resistance construction gives longer utility to the user and reduce the need for the new.

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Okay.

http://www.altuslumen.com/Ultra_Pro_led_light.html said:

Safe
LED contains no mercury or toxic heavy metal.

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Very true.

http://www.altuslumen.com/Ultra_Pro_led_light.html said:

LED is cool light source and it is safe to touch.

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LIES! Horrible lies! It's like they believed that Philips guy on "Manmade" who said that "with LEDs, there's no heat involved." Lies. Every device creates waste heat. "In this house, we obey the laws of thermodynamics!"

http://www.altuslumen.com/ultrapro_specifications.html said:

LED Type 2.5W High power LED x36pcs
Light Output 6500Lumen (Ultra Mode)

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6500L/36LEDs=180L/LED: I don't know if that's out the front lumens or emitter lumens. Still, it's doable with reasonable bins.
180L/2.5W=72L/W: Yep, pretty reasonable.

http://www.altuslumen.com/ultrapro_specifications.html said:

Power Consumption 90W (Ultra Mode)
36W (Full Power Mode)
1W (Long Life Mode)

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6500L/90W=72L/W: Again, assuming they used decent bins and are quoting emitter lumens, doable.

http://www.altuslumen.com/ultrapro_specifications.html said:

Power Source 10x D-size Alkaline primary batteries *
10x D-size NiMH rechargeable batteries, 9-10Ah/cell
AC/DC Power Adaptor >120W, 24V
12V or 24V Car Cigarette Power

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90W/10 cells=9W/cell
9W/1.5V=6A

They say that 10D alks are okay for 90W? A fresh D alk will not stay at 1.5V for very long at 6A, if it can deliver that at all. I'd expect alk runtime on "Ultra" to be a small fraction of NiMH runtime.

http://www.altuslumen.com/ultrapro_specifications.html said:

Battery Powered Time ** 1.3hrs (Ultra Mode)
3.3hrs (Full Power Mode)
13.3hrs (Long Life Mode)

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Yeah, 1.3 hours ON NIMHS ONLY (decent ones of at least 10Ah or so). With alks, you'd get maybe 10-20 minutes on "Ultra," if it can handle that level at all.

90W*1.3h=117Wh
36W*3.3h=118Wh
1W*13.3h=13.3Wh

Whoa, what's up with the "Long Life Mode" runtime? It should be closer to 117h, not 13h.


Well, other than some wrong-looking numbers, there were only two horrible lies. Could be worse, but I would still have major doubts until the output and runtime numbers (as well as regulation) were verified by an outside source.

Thanks for posting the link. Good times.

TigerhawkT3 said:

They say that 10D alks are okay for 90W? A fresh D alk will not stay at 1.5V for very long at 6A, if it can deliver that at all. I'd expect alk runtime on "Ultra" to be a small fraction of NiMH runtime.


With alks, you'd get maybe 10-20 minutes on "Ultra," if it can handle that level at all.

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6A from alkaline D batteries:laughing:! Ya right! In my horrible torturing of what Ds can do I only got Ds to power 30 watts when I added 2 extra batteries to overdrive the bulb. Even while pulling 2.5A and being overdriven by 3 volts the bulb only gets around 10.5-11 volts vs. the 15 I'm throwing at it. Even with all that the light only last like 15 minuets before is starts dimming even more. I give you my word: There is no wayyyy that you could pull 6A from a Alkaline D:shakehead.

well i read into it a bit more, and it says that you cant use the 90w mode with d cells. only with the rechargeable pack

I'de stop short of ridiculing this concept... If you use 4 AA's to operate a
power switching ckt., you can strobe a couple banks of D's. You don't have to use all the ampereage.

If you manage the power, you don't have to throw batteries at the problem....:thinking:

romulus said:

I'de stop short of ridiculing this concept... If you use 4 AA's to operate a
power switching ckt., you can strobe a couple banks of D's. You don't have to use all the ampereage.

If you manage the power, you don't have to throw batteries at the problem....:thinking:

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I don't understand what you mean.

What is the voltage requirement for this lamp? If they're using 10 D's in series at 1.5V, that's 15V.

There are 6V 3A batteries. Get 4 and make two 12V banks and switch back and forth between them. It's a simple ckt., and it will make the most of the batteries. Basically, you use half the current if you switch the banks. Be glad to send you a schematic for free. PM me at [email protected]

I think you're missing our point. Our point is that 10D alks could never handle 90W, and SilentK confirmed that only the NiMH pack can handle the 90W "Ultra Mode."

Oh, and instead of using a switching circuit to switch between two batteries for extended runtime, you could just wire the two batteries in parallel and accomplish the same thing (not that that was the issue here).

funny, it never occured to me just how bright the data bank must be...

6500lumens from 36leds rouhgly 180 lumens per led, not exactly an insane drive level

databank70 = 70leds at 1.8A.......oo:

Crenshaw

Basically, we use a CD4017BE (driven by C cells) to strobe the battery banks (2 - 3 D Cells) This is not a parallel ckt. because we are only selecting one bank at a time. Furthermore, by selecting banks with every other digit of the 4017, we can draw current from the L - C charge during the deadtime between cell selection, this maximizes use of the batteries. I'm doing this from memory, so forgive the missing values. I drove an incandescent for several hours with this ckt.

Work to be done:
1. Use a 555 clock or equiv. to drive the CD4017B
2. Select inductor value (1 - 2mh)
3. Select # of D cells (3 banks of 3 should do it)
4. Select clock frequency???
http://www.ledhot.com/designservices/sharedstuff.html

romulus said:

Basically, we use a CD4017BE (driven by C cells) to strobe the battery banks (2 - 3 D Cells) This is not a parallel ckt. because we are only selecting one bank at a time. Furthermore, by selecting banks with every other digit of the 4017, we can draw current from the L - C charge during the deadtime between cell selection, this maximizes use of the batteries. I'm doing this from memory, so forgive the missing values. I drove an incandescent for several hours with this ckt.

Work to be done:
1. Use a 555 clock or equiv. to drive the CD4017B
2. Select inductor value (1 - 2mh)
3. Select # of D cells (3 banks of 3 should do it)
4. Select clock frequency???
http://www.ledhot.com/designservices/sharedstuff.html

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What advantage does this circuit have over parallel wiring?

It's really just series wiring, selecting one bank of cells at a time.
major advantage is, we use only a quick zap of power instead of
a consistant drain. By using the c.e.m.f. of the coil to supply
energy during dead time, the load doesnt "know" your giving
the battery a breather.

No doubt that parallel will last a long time i.e. current, but there's no
time off for the battery, so like series, battery life decays relatively
fast. Watts is watts is watts. Load doesnt care how fast it sucks you
dry, as long as it does. (no pun intended.)

The intension is to extend battery life by reducing amperage. It works.
I'll try to get some time to come up with some actual values as I've
lost my original schematic.

BTW - This forum is great, I've checked out several before this one and you guys are the real deal!! Everyone thinks!

romulus said:

It's really just series wiring, selecting one bank of cells at a time.
major advantage is, we use only a quick zap of power instead of
a consistant drain. By using the c.e.m.f. of the coil to supply
energy during dead time, the load doesnt "know" your giving
the battery a breather.

No doubt that parallel will last a long time i.e. current, but there's no
time off for the battery, so like series, battery life decays relatively
fast. Watts is watts is watts. Load doesnt care how fast it sucks you
dry, as long as it does. (no pun intended.)

The intension is to extend battery life by reducing amperage. It works.
I'll try to get some time to come up with some actual values as I've
lost my original schematic.

BTW - This forum is great, I've checked out several before this one and you guys are the real deal!! Everyone thinks!

Click to expand...

I don't understand how this provides more current from the cells than both packs wired in parallel. There, instead of drawing the full current from one battery and then the other, you only draw half the current from each pack continuously.

Back at the start of this thread, NickBose stated he heard that a 6500L LED lamp could run off of 10D Cells. Assuming the cells are not di-lithium crystals or even niCad - just Alk-Manganese, it can definately be done. So far some have said no, some yes, I'm saying yes.

The circuit I scetched is just a way to get even more run time using fewer batteries. The unloaded voltage pulse out of the ckt. is about
18V pk. When loaded drops down to about 15V. I'm not saying that it produces more current, just makes better use of the power available.

Forgetting about the switcher ckt., Nick's light, regardless of lumen output, requires 90W (mfr. spec) from 10D cells. This means the load current is 6A. 10D cells can drive a 6.8A load for about 24hrs (Duracell Spec), so again, I agree with the claim that it can be done.

Tough crowd.....Jeezz..

I dug just a little deeper into the page to get to the specifications at http://www.altuslumen.com/ultrapro_specifications.html and it specifically states (with an asterisk of course) that "Ultra Mode is not available when the primary batteries are being used."