vinhnguyen54 Nichia NVSL219AT-H1 4500K, 92 CRI, B10 Bin P60/D26 PRE-ORDER SALE THREAD

[TranquillityBase]

Beautiful tint!

[csshih]

I should have made those bags look better



Always interested to see your results, Vinh

Craig

[Diablo_331]

Tuned in for the results! Good luck Wayne!

[vinhnguyen54]

By the way. All Nichia orders will be thermal potted by default. If you don't want it please let me know! I will post current vs brightness test tonight. A very informal test with my light meter of course since I don't have an integrating sphere.

[Mike Docherty]

I'm getting ready to send payment for a single mode. Thermal potting is fine, but can you do solder filled on these?

[vinhnguyen54]

I can. Solder filled is $5 more though...

[ToyTank]

By the way. All Nichia orders will be thermal potted by default. If you don't want it please let me know! I will post current vs brightness test tonight. A very informal test with my light meter of course since I don't have an integrating sphere.

Can't wait to see your test. Nichia has light output nearly linear up to about 2A, but I think others have said returns diminish quickly past 1A. The datasheet shows a definate sag past 1A but IMHO not bad at all. Can't wait to see your results

[jak3All3n]

hi vinh, are there any left for order? or do we have to wait for the next batch?

[vinhnguyen54]

hi vinh, are there any left for order? or do we have to wait for the next batch?

I have 8 left in hand un-spoken for. I will also order another 15 which should arrive in 3 days. So feel free to place your order.

[vinhnguyen54]

Current VS Brightness Update!!!

This is a very very informal test but I do hope it gives us a little clue on how the Nichia 219 perform at different current levels. I measured the initial lux at turn on and after 40 seconds on each run. I focus the hot spot at the same spot on the ceiling every time with the drop in at a constant elevation. The Nichia 219 is not thermal potted and is not in a host. Thermal management therefore is less than ideal so the lumen sag is more pronounced. The XML-U2 was tested at 3.85A and is thermal pootted but no host either. The Thrunite Scoprion V2 with turbo head is 100% stock.

Nichia 219:
2.1A -> 82 lux - 68 lux
1.75A -> 78 lux - 68 lux
1.4A -> 72 lux - 68 lux
1.05A -> 65 lux -60 lux
.7A -> 47 lux -47 lux

3.85A XML-U2 Narrow wide beam smooth reflector
256 lux - 230 lux

Thurnite Scoprion V2 Turbo Stock
225 lux - 200 lux

Restroom 42" 17W diffused florescent tube
168 lux - 166lux

Conclusion: Ok, so as you can see, heat definitely made the drop in sag to about 68 lux afer 40 seconds regardless of how heavy it was driven (up to 2.1A for the test). At 2.1A the drop in was hot very fast. I could not tell the difference between 1.4A and 2.1A in person with my eyes. I honestly think 1A is the best current to run this LED. But I had quite a number of request to push this LED until the there is a tint shift. I don't think the tint will shift until 2.5A for that matter. But really at currents over 2A you are just getting heat unless you can liquid cool this LED. LEDs like the XML, SST-50 or SST-90 I can see why we would want to push the LED way over it's limit to squeeze every bit of lumen but the Nichia 219 is a smaller LED. The intended purpose of this LED should be tint and efficiency. Therefore I have decided to push all of these LEDs to 1.52A on High. Medium would be 35% of that and Moonlight would probably be 1-3 lumen. 1.52A is actually driving this LED very hard already. But I do believe that once I thermal potted it and have it fitted in host snugly the lumen sag would reduced. That's all folks! Let me know if you want yours drive differently.

[BarryH]

These are looking really good!

Please do not glue the reflector on mine.

[vinhnguyen54]

EDIT: I will glue some reflectors to help center the LED for a perfect beam. I will not glue if I get special request.


Please read post 100 and let me know if you want your drop in driven lower or higher than the recommended 1.52A

[ykb]

1.2A max for me, please

[Harry999]

That is a very nice tint indeed. Vinh, I emailed you short while ago with some further thoughts on mods with this led. Look forward to seeing the end result.

Thanks

Harry

[csshih]

Vinh,

I've had my leds tint shift at 2.5-3A - angry blue

Craig

[scout24]

1A for mine, please. Going for runtime as well as output/ longevity. Thanks!

[BarryH]

1.2 Amp max for me please. Thanks

[ToyTank]

Push mine to ~1.75a if you can please. That should make Med ~575-600ma which is what I'll be using 75% of the time, and moonmode 24% of the time.

[vinhnguyen54]

Got it! :-) I will be shipping around 20 Nichia orders today. I will built more tomorrow night. My GF is making me taking a day off today from flashlights.

[CarpentryHero]

Cool, have a great weekend Vinh. Thanks for the updates and tests

[vinhnguyen54]

Hello Everyone!

I just ran out of the 2.5-4.5V Driver with Moonlight-Medium-High. I only have 2.8-6V Low-Medium-High Drivers left. The following names could get this driver unless you would like to wait. For oversea shipment. Please let me know.

1) Ryan
2) Tom
3) Levi
4) Ma
5) Tim
6) Michael
7) Tammiie
8) Brian
9) Carlos
10) Neale
11) Dan

If your name is not on the list your order has been shipped as requested.

[nfetterly]

Hello Everyone!

I only have 2.8-6V Low-Medium-High Drivers left. The following names could get this driver


10) Neale

That Driver will be just fine for me. If it can be set for 1 A on high that would be nice, otherwise 1.5A is just fine.

Thanks, Neale

[vinhnguyen54]

That Driver will be just fine for me. If it can be set for 1 A on high that would be nice, otherwise 1.5A is just fine.

Thanks, Neale

I can set to 1A on high no problem!

[vinhnguyen54]

I can set to 1A on high no problem!

Actually 1.14A :-P

[ToyTank]

I hope you had a good non flashlight day

Do you know how much or what % low draws on the 3-6v?

[vinhnguyen54]

100% High
30% Medium
5% Low

[vinhnguyen54]

100% High
30% Medium
5% Low

Would you like this new driver?

Oh and I am soldering flashlights right now. I have quite a few orders I have to work on. :-)

[ToyTank]

That is fine driven @ 1.75a still please

Your a busy guy!

[run4jc]

Hello Everyone!

I just ran out of the 2.5-4.5V Driver with Moonlight-Medium-High. I only have 2.8-6V Low-Medium-High Drivers left. The following names could get this driver unless you would like to wait. For oversea shipment. Please let me know.

11) Dan

As long as this driver has last mode memory it will be fine - with standard 1.52 drive level, please.

And I responded to your email also.

Thanks

[F250XLT]

I'll wait, as long as it's fairly soon...Not sure how I missed out on this run, it appeared as if I was #3 on the list.