Thanks Barkuti! So its better in a FET driver for runtime (and it would mean that less heat would be generated), and its worst in regulated mode.
I guess I will find out how much real life difference it makes. I know one flashlight of mine has a FET, the rest are probably regulated.
is there a risk that the led maybe broken if using DD driver, because the Vf is so low so the current will be high
@ AEDe:
Sorry for asking dumb questions…
I expressed interest here (#40 on your list). I don’t mean to rush anything but I don’t know who’s now in charge for the next step. Are you now waiting for payment from me or do I need to wait for further instructions via PM from you before I send the money? As there were some discussions about Paypal fees (commission, currency exchange, bla bla) some pages before I don’t know if your prices in the first post of this thread are the final prices that just need to be added up. Can I use PayPal for goods and services or are your prices calculated for “friends and family” only? Any hint would be greatly appreciated. Thank you!
Yes.
In my test of the 70cri 351D it did not even make peak lumens until 4.2v. So there should not be any worry about killing it with an FET driver if it is well heat sinked unless the 90cri version is much lower vF.
It does have quite a bit lower VF at 3A compared to the 70CRI 351D.
It’s not at 90CRI 219Cs though, so no problem there.
I have the same basic question as FlashTom.
I want to buy at least 16 of the 3000k ones. Way too good to pass up. Thinking if I want the 4000k ones too.
Sorry guys I was very busy during last two weeks. I have enough LEDs for all who now in the list.
So if you dont have a questions and request, you could not wait my PM and pay to my PP address andreyderbishev@yandex.ru according price in the top of first message
351B 3000K 90cri are available. Price
1-49 0.55$/pcs
>50 0.50$/pcs (including PP fee)
351D 4000K 90cri will be available in a week.
Price
1-19. 1.7$/pcs
20-49 1.6$/pcs
>49 1.5$/pcs
351D 5000K 70cri on order
Price
1-19. 1.7$/pcs
20-49 1.6$/pcs
>49 1.5$/pcs
Shipping 5$
All prices include PP fee.
You should use “for goods and servises”
And make sure that you send $ (or euro according ECB rate) not RUB
In comment in PP please write your BLF nickname.
I just sent payment for
24x 4000k
6x 5000k
24x 3000k
When do you expect the 5000k to arrive?
Payment sent.
payment sent early morning
They are allready in stock.
All PM have been sent. I hope so.
I will start sending packages on Monday/
As agreed via PM yesterday, my order is now updated to:
4x LH351B 3000K CRI90
10x LH351D 5000K CRI70
Payment is sent.
Еще раз большое спасибо! 
Payment Sent.
Payment sent
Thank you so much Andrey! :+1:
Order extended by 16x LH351D 4000K CRI90, payment sent.
I can't wait to get these! Nichia like CRI, low cost, and even domes with no tint shift.
What is everyone planning on putting them into? :)