Actual Lumen Readings in 10.5in Sphere.

[elho]

To my eyes in a C2 a P91 bulb looks brighter to me with 2 X IMR16340 than a Nailbender 2.8 amp 3 mode SST-50 on high with 18650. Am I nuts?

No, you are just mislead by your eyes. You even already know the answer:

Well the spill of the SST-50 may be brighter but the hotspot looks dimmer.

The hotspot of a P91 is indeed notably brighter, as can also be seen outdoor beamshots (P91 with 2x18500 and nailbender DD SST-50 there).
But that only means that it throws better, it has better Lux readings. Lumens take the complete light output into account and the hotspot is just a tiny spot compared to the large circle that the spill is (when projected on a wall or something).
A brigther hotspot just takes some more light in that tiny area, a brighter spill needs a lot of light spread out over that large area. Thus, for Lumens, a little brighter spill means more than a notably brighter hotspot.
And the SSt-50 drop-in just has that brighter spill (even notadly brighter 🙂).

All that said, the P91 on two li-ion cells is still quite impressive and great to educate non- and newbie-flashaholics who think that it was because of the LED that bright flashlights exist. :naughty:

 

[Bullzeyebill]

Also, there is something about that High CRI, yellowish incan beam that seems to print over most LED light beams even when they have the same lux readings, also there can be more lumens in that same incan beam (wider hotspot) compared to many LED flashlight beams.

Bill

 

[recDNA]

No, you are just mislead by your eyes. You even already know the answer:


The hotspot of a P91 is indeed notably brighter, as can also be seen outdoor beamshots (P91 with 2x18500 and nailbender DD SST-50 there).
But that only means that it throws better, it has better Lux readings. Lumens take the complete light output into account and the hotspot is just a tiny spot compared to the large circle that the spill is (when projected on a wall or something).
A brigther hotspot just takes some more light in that tiny area, a brighter spill needs a lot of light spread out over that large area. Thus, for Lumens, a little brighter spill means more than a notably brighter hotspot.
And the SSt-50 drop-in just has that brighter spill (even notadly brighter 🙂).

All that said, the P91 on two li-ion cells is still quite impressive and great to educate non- and newbie-flashaholics who think that it was because of the LED that bright flashlights exist. :naughty:

Yes, I'm running my P91 on 2 X 18500 these days so that explains why it looks brighter to my than my 2.8 amp SR50. I had no idea it threw so well. I was very impressed with the beamshot of the Neofab legion II. The huge flashlights and HID's are not my cup of tea but I'm always looking for something wicked bright that is no bigger than a 2 X D Maglite.

 

[bigchelis]

All my warm lights look brighter to my eyes and now I need to get a high CRI XP-G build put together to see what all the fuss is all about.

bigC

 

[shieng]

Re: Multifunctional Dog

I'll send you one sometime soon.

Link removed
Currently planning on building my own sphere.
I'll need a bit of advice, so that we can ensure mine is accurate.so cheap and nice.

 

[Bullzeyebill]

Re: Multifunctional Dog

shieng, are you serious? If your comments re sphere were not there this post would have been deleted as spam and you would have been banned. I will be watching further posts by you.

Bill

 

[bigchelis]

Re: Multifunctional Dog

I purchased a Quark Mini 2*AA because I read Ti-Force reviews and it seemed like a small EDC type light that can use readily available AA cells....



Quark Mini 2*AA____________XP-G R5______________2 NiMH Platinium____________157.1______1 sec___________________
.950mA at the tail_______________________________________________________144.0______30 sec__________________
_____________________________________________________________________140.5___ ___1 min_________________
_______________________________________________________________________ 140.5______ 2 min____________________
__________________________________________________ _____________________140.5______ 3 min____________________
_______________________________________________________________________ 135.7______ 4 min____________________






Quark Mini 2*AA____________XP-G R5______________2 NiZn AA_________________202.4______1 sec___________________
1.125A at the tail_______________________________________________________185.7______30 sec__________________
_____________________________________________________________________183.3___ ___1 min_________________
_______________________________________________________________________ 181.0______ 2 min____________________
__________________________________________________ _____________________178.6______ 3 min____________________
_______________________________________________________________________ 176.2______ 4 min____________________

 

[bigchelis]

Re: Multifunctional Dog

Here is what is next to test. Hopefully in 2~3 weeks.

PCC made the Huge Copper Heatsink for me. Then Lamdalights is making the SST-90 copper plug to mount the LED to copper!!! So, without PCC or Lamda I wouldn't be able to do this. Plus; I been wanting to see 1500 plus OTF from an L1 platform for a while now.

• Surefire L1 bezel
• Copper heatsink
• Copper to LED bonding
• SST-90 3A then again at 6~8A via burn-in
• Direct Drive off IMR 18650
• Top heavy for sure

Sneak Peak

 

[Bullzeyebill]

Re: Multifunctional Dog

Is that a Kroll tailcap switch? If so, I'm wondering how it will handle the current.

Bill

 

[bigchelis]

Re: Multifunctional Dog

Is that a Kroll tailcap switch? If so, I'm wondering how it will handle the current.

Bill

yes, the Kroll switch is not that great for high current.

For OTF testing I will be using an E-18650 hosts with IMR 18650 cell. The tailcap has a McClicky and I am expecting melting a couple and then doing a Zero Tolerance somehow after.

bigC

 

[Bullzeyebill]

Re: Multifunctional Dog

The tailcap has a McClicky and I am expecting melting a couple and then doing a Zero Tolerance somehow after.

bigC

LOL. :thumbsup:

Bill

 

[PCC]

Re: Multifunctional Dog

yes, the Kroll switch is not that great for high current.

For OTF testing I will be using an E-18650 hosts with IMR 18650 cell. The tailcap has a McClicky and I am expecting melting a couple and then doing a Zero Tolerance somehow after.

bigC

Glad to see that you can use that heatsink.

I know that McClickies are relatively cheap, but, you should save yourself the money and frustration by going straight to the ZT switch. It was a PITA to remove the melted switch in Steffan's DD SST-50 light that I fixed last year. If you need assistance with getting something made then please let me know.

 

[recDNA]

Re: Multifunctional Dog

I'd love to try one of those FETtie switches if they were more plentiful.

 

[bigchelis]

Re: Multifunctional Dog

I'd love to try one of those FETtie switches if they were more plentiful.

I agree. Those FETtie switches are awesome. I will have a 6000 Lumen SST-? build in 1 month to test out that will have a FETtie switch due to the high current.

For now this is the business end of the SST-90 Pocket Rocket by Lamdalights(Kevin). I should have it tested by this Friday!!!! My only issues is the tailcap, but I might have to rig something together just to have some numbers for you all.


Look Mom "No STAR"

 

[ti-force]

Re: Multifunctional Dog

Definitely gonna bring a new meaning to the term "pocket rocket". 🙂

 

[recDNA]

That copper/led setup is a thing of beauty! You can't get 6 - 8 amps from that protected battery can you?

 

[bigchelis]

That copper/led setup is a thing of beauty! You can't get 6 - 8 amps from that protected battery can you?

Nope. With that AW 17670 Protected cell it already does 5A at the tail and thats with no "burn in".

For testing it will be an IMR 18650 which I suspect will generate 6A or more. I also have some 2/3A NiMH cells and 3 of these will give way more current then IMR 18650.

I really hope it breaks 1500 OTF, 10sec at least:candle:

bigC

 

[recDNA]

I also have some 2/3A NiMH cells and 3 of these will give way more current then IMR 18650.

What are 2/3A NiMH cells?

 

[bigchelis]

What are 2/3A NiMH cells?

As most people know in terms of OTF lumens due to cell sag the NiMH chemistry is still KING. My SST-90 2D Mag and 3D Mag builds all perform much better when powered by NiMH cells vs. IMR 26650/IMR 26500.

The 2/3A NiMH cells are rated for 30A and are about the size of a single CR123 Primary, but a tad shorter. I can probably fit 3 of them in a 18650 tube for testing or will make it happen without the tailcap.

In my tests these little cells always produce more tailcap current then the IMR 18650 or even IMR 26500. They are so small and the voltage input is the same, yet they are awesome. I use them to break in SST type of emitters too. 4 of them can be used to overdrive SST-90 emitters to "burn it in" These are the cells I let another CPF member borow to burn in his 4Sevens S12 and from his thread he went from 3.5A to 7A after "burn in"

bigC

 

[ebow86]

I apologize in advance guys, this is an awful big thread and I may have missed what I'm looking for. I am looking for the OTF readings on the Malkoff M61W, particually running on primaries. I have the 4000K version, so I don't know if there's any difference between the different temp M61W's as far as output goes. Reason I ask is I have an M61W 4000K that gene rates at 220 lumens but I was thinking that looked a little conservative.