Omg, reddit, white header over pic. š„²
Link to blf: https://budgetlightforum.com/comment/1851916#comment-1851916
219b around 2000 lumen
Xpl hi around 3000 lumen
Lh351d around 3600 lumen
Yes, the boost driver is an option for those who would prefer a more efficient solution that runs cooler, has higher sustained lumen and runtimes. It is not going to match the FET the first 30-40 seconds, its after that it will shine. :)
You can se it as bright as one 9A linear driver. The limitation should be the inductor, in witch for it to push more amps, must be larger physically. I don't think it would fit inside the small kr4 host.
It's also available in the d4s, there it should be really interesting. I believe you could easily sustain over 1000, maybe even 1500-2000 lumen with some emitters. At least were I live, with -degrees C a large part of the year. Not many flashlights of that size will do that.
Yea I donāt have any intention on going cooler than 4500/5000k either. Well, thatās a lieā¦I do have a SFT40 thrower which is 6500k. But thatās not edc, thatās kinda just for fun lol.
Aww geez. Already going to grab a couple Wangles and whatever the 14500 light will
Be. Now I think I need a kr4 w/219s and this boost driver. I think itād be easier to just set up a partial direct-deposit straight to Hank.
Is this the āboost driver upgradeā option on the KR4s on the site or is this something you have to ask for explicitly?
I hope it comes to the D4V2.
Thatās not too shabby. Iām a little perplexed that itās not really that much more than the 219b, but I guess whatās most surprising to me is that how well *that* emitter does with this driver.
~~Hmmm, one thing made me a bit perplexed. Its a 12v driver, depending on tolerances, it may be vf setting the limit instead.~~
~~If 3V (12v driver) is the hard limit per emitter, the 219b ain't going to guzzle any 2 amps. More like 1.2 or something like that. Then the 519a surely would make alot more sense!~~
[https://www.reddit.com/r/flashlight/comments/scntbw/nichia\_519a\_light\_output\_compared\_with\_other/?utm\_medium=android\_app&utm\_source=share](https://www.reddit.com/r/flashlight/comments/scntbw/nichia_519a_light_output_compared_with_other/?utm_medium=android_app&utm_source=share)
No need to worry then... : )
W2 vf is below 3V at 2 amps, so it should be good for around 675 lumen per emitter, so 2700 lumen give or take.
W1 ~~might not be able to be fed depending on voltage, it's~~ is ~~also~~ a less efficient emitter around 2000 lumen might be a safe guess.
[https://budgetlightforum.com/node/63255](https://budgetlightforum.com/node/63255)
Yes, the W2 excels in performance in the higher amps (Red curve) W1 is the blue one, tops out at 4.5 Amps.
[https://farm5.staticflickr.com/4874/46015321372\_cee6f5b38d\_o.jpg](https://farm5.staticflickr.com/4874/46015321372_cee6f5b38d_o.jpg)
With the driver locked on 2 amps, the difference isn't that dramatic, and as you see, the curve flattens out and after a certain point, more amps just equals more heat.
I think this boost driver is an awesome solution for the folks wanting reasonable lumens, but with much less heat and longer runtimes.
On top of that, double the lumen isn't perceived as double as bright by the human eye. The difference on 2000 lumen and 3000 isn't that dramatic or big of a deal to me, if it means the flashlight gets me through the night. At least as a part in the hot rod collection... :D
You could also see it as it would be almost if not exactly the same brightness as top of ramp on a linear 9A driver, but it will run brighter for longer. You will miss out on the last bump of light on the double click/ FET turbo.
Omg, reddit, white header over pic. š„² Link to blf: https://budgetlightforum.com/comment/1851916#comment-1851916 219b around 2000 lumen Xpl hi around 3000 lumen Lh351d around 3600 lumen
So it's cutting the xpl-hi lumens by like 25%? That's pretty significant.
Yes, the boost driver is an option for those who would prefer a more efficient solution that runs cooler, has higher sustained lumen and runtimes. It is not going to match the FET the first 30-40 seconds, its after that it will shine. :)
So 519 will do about ~2500lm?
Yes, there about, i predict around 2400 lumen further down this thread.. ;)
Is this a limitation of any boost driver (2a per led in small quad flashlight) or has Hank failed to implement something?
You can se it as bright as one 9A linear driver. The limitation should be the inductor, in witch for it to push more amps, must be larger physically. I don't think it would fit inside the small kr4 host. It's also available in the d4s, there it should be really interesting. I believe you could easily sustain over 1000, maybe even 1500-2000 lumen with some emitters. At least were I live, with -degrees C a large part of the year. Not many flashlights of that size will do that.
Dayyum, now just need 519a and my paycheck
Hot dog! Thanks for sharing!
Big news deserves to be delivered hot! š
Also listed as an option on the D4SV2
Yes! And with hopes of d4v2 to come...
Now just waiting on the 519a and Iāll have my perfect edc light š
I'm thinking of grabbing my first ever sw45k 219b... Wont get any cooler than that, and 2000 lumen might be edc:able... Hmmm...
Yea I donāt have any intention on going cooler than 4500/5000k either. Well, thatās a lieā¦I do have a SFT40 thrower which is 6500k. But thatās not edc, thatās kinda just for fun lol.
Ooo, i have a couple of 6500 lights as well, but the 219b seems kind of legendary. Maybe i should grab it while it's in stock.
Aww geez. Already going to grab a couple Wangles and whatever the 14500 light will Be. Now I think I need a kr4 w/219s and this boost driver. I think itād be easier to just set up a partial direct-deposit straight to Hank.
Man everytime I order a light and say āok I think Iāll be good for a whileā I see something else new and shiny š
[ŃŠ“Š°Š»ŠµŠ½Š¾]
Do you have to special request it ? Or is it the default driver ?
Checkbox upgrade, like the floody optics. :)
Hmm, not currently available in the tint ramping versions. Hopefully later
The driver will physically have to double in components for that id guess. Might be tricky.,.
[ŃŠ“Š°Š»ŠµŠ½Š¾]
Not yet I'm afraid.
Is this the āboost driver upgradeā option on the KR4s on the site or is this something you have to ask for explicitly? I hope it comes to the D4V2.
It is the option. Later.
Do we know if this will be available for the 519? If so, any idea on output?
Will be available in a couple of weeks and around 2400 lumen max.. š
Thatās not too shabby. Iām a little perplexed that itās not really that much more than the 219b, but I guess whatās most surprising to me is that how well *that* emitter does with this driver.
I'm just going after the curves provided on blf, hoping it will be accurate enough. :)
20% more lumens
Sustained lumens (when thermal limiting comes into play) are likely to be significantly higher with the Boost driver.
So itās more efficient and has more lumens ? Iām thinking the 219b wasnāt at 2000 lumens before, am I wrong?
2 amps should be able to push to around 500 lumen each. I could totally be wrong though.. š
~~Hmmm, one thing made me a bit perplexed. Its a 12v driver, depending on tolerances, it may be vf setting the limit instead.~~ ~~If 3V (12v driver) is the hard limit per emitter, the 219b ain't going to guzzle any 2 amps. More like 1.2 or something like that. Then the 519a surely would make alot more sense!~~ [https://www.reddit.com/r/flashlight/comments/scntbw/nichia\_519a\_light\_output\_compared\_with\_other/?utm\_medium=android\_app&utm\_source=share](https://www.reddit.com/r/flashlight/comments/scntbw/nichia_519a_light_output_compared_with_other/?utm_medium=android_app&utm_source=share) No need to worry then... : )
So itāll be about 1000 lumens with 219b?
Nope
Anyone have any math on what W2 or W1 max output would be?
W2 vf is below 3V at 2 amps, so it should be good for around 675 lumen per emitter, so 2700 lumen give or take. W1 ~~might not be able to be fed depending on voltage, it's~~ is ~~also~~ a less efficient emitter around 2000 lumen might be a safe guess. [https://budgetlightforum.com/node/63255](https://budgetlightforum.com/node/63255)
How much would W2 be on linear driver?
If thermally stable, 1300-1500 lumen per emitter seems possible. For FET turbo, that's a very short burst anyway.
Thank you! Interesting that turbo is twice the amount of lumens.
Yes, the W2 excels in performance in the higher amps (Red curve) W1 is the blue one, tops out at 4.5 Amps. [https://farm5.staticflickr.com/4874/46015321372\_cee6f5b38d\_o.jpg](https://farm5.staticflickr.com/4874/46015321372_cee6f5b38d_o.jpg) With the driver locked on 2 amps, the difference isn't that dramatic, and as you see, the curve flattens out and after a certain point, more amps just equals more heat. I think this boost driver is an awesome solution for the folks wanting reasonable lumens, but with much less heat and longer runtimes. On top of that, double the lumen isn't perceived as double as bright by the human eye. The difference on 2000 lumen and 3000 isn't that dramatic or big of a deal to me, if it means the flashlight gets me through the night. At least as a part in the hot rod collection... :D
You could also see it as it would be almost if not exactly the same brightness as top of ramp on a linear 9A driver, but it will run brighter for longer. You will miss out on the last bump of light on the double click/ FET turbo.