Hi led4power can I ask you for advice? I have a problem with ld-4a driver. It worked fine in C8+ host and wf2 until I try to replace the driver spring. I probably messed up something and shorted + and - on battery side. tried to turn it on (it won’t work) so I turned it off and found out it was a short there. I fixed the short but from this moment, the driver gives only 200ma to the led. No modes no settings, nothing seems to work. Don’t you know if I’ve destroyed it completely or if is it possible to somehow fix it? Thank you.
Send me few pictures of driver over PM, it's hard to tell without seeing potential damage.
Ok try to do some pictures tomorrow but I think, nothing is visibly wrong (other than my poor soldering ;-)). Even no ” magic smell”. I wonder if it could be too much heat during soldering the spring?
I have a convoy S2+ that I was trying to put one of the RGB tail caps in. I have 3 of them and I tried the switch in all of them. And the convoy with the H17F Dr Jones driver is the only light that it sort of works in. Except the RGB doesn’t stay on. It flickers for a second and then stays off. It didn’t work at all in the other 2 convoy’s.
I know ILC-0 RGB works with LD-x4 driver, I can't guarantee for other drivers, especially since they usually even don't have proper bleeder (RGB is power hungry compared to single colors).
That’s ok, not a big deal. I’ll just a build with that driver! Soon as I figure which one to build…
When will the Luxeon V 4000K be in stock again?
I'm not sure. There is also 3000K "available" (3month lead time) and price is higher, but it looks interesting. If there is enough interest I would try to get 3000K first (mixing with 5700K in quads/hex would give very nice ~4300K tint,maybe even/probably under BBL).
What’s the CRI on the 3000K Luxeon V you are looking at?
70CRI, but if tint is anything like 4000K (and I believe it is even better/closer to BBL since low CCT LEDs tend to be closer to BBL in general), it would still look great with crazy output.
That is good news. The 4000K Luxeon V has one of my favorite Non-90CRI LED tints. Hope you can get a few for us warm tint fans!
+1 for 4000K Luxeon V
Luxeon V2 5000K >>> Luxeon V 4000K >>> Luxeon V2 3000K
You gotta love these leds 
Thank you for the answer, led4power. 
I’m sure tint mixing with 3000K and 5700K would look great. Recently I did a lot of tint mixing in multiple led flashlights. But the 4000K Luxeon V would still be needed for single led flashlights.
Neven,
I’m thinking about modding a C8 with one of my UV leds. They run upto 3A @ 4.8V.
Would an LD-A4 be a good fit for running the emitter at full power from a single decent 18650?
Wow. Those tints do look great. Hmmm…
UV LEDs generally (especially <385nm) have very high Vf so linear drivers are not good fit for that purpose.
Thanks. I’ve apparently missed that this driver was a linear driver. Revisiting the product page and the PDF i can clearly see it now. Even the name suggested that
I guess I will have to find a boost driver.
Boost is not good too,you'll need buck-boost since LED voltage can be lower than full battery (4.2V). Other option is to use two cells in series (18350/CR123) + linear or buck driver.
Thanks alot. I don’t want to hijack your thread, but can you point me towards some good drivers? A single mode full power boost driver would be okay