Lumileds Luxeon V, test of a 4000K 70CRI emitter

~1week (new 16mm and 20mm).

Thx!

Whats its the recomended center gasket for this led in a convoy s2+ (7mm opening reflector)?

I forgot to update status in this thread; DTP PCBs are available now:

https://led4power.com/product-category/mcpcbs/copper-dtp/

You will have to adjust one, I reamed a XP gasket with one of these:

I’m still waiting for my order from led4power. Hoping it’ll get here soon to see what the hype’s about. LOL

I just came from outside. Had a bit of fun :innocent:

Cool pic! :sunglasses:

Ordered a triple and a quad 4040 mcpcb with luxeon v 4000k.

Triple went into a S2+ and quad in the D4. This emitter made them flood monsters! The triple pulls 17A with a vtc5a!

It really puts every other triple and quad into shame in terms of total output to tint ratio, doesn’t it?
What I noticed though is that to some people triple dedomed xp-g2 is more impressive due to a lot more throw and still quite a lot of spill that spreads near your toes although it greatly depends on area where you are using lights.

Yeah, I got a M2 quad with these. Love the tint, but flood monster it is!

My most used Luxeon V is starting to show signs of the abuse it has been through, there is a dead spot in the center of the emitter.

It has been in many different hosts before ending up in a Sofirn C8 and used extensively as my “walking the dog” flashlight. It has always been used with high drain batteries and FET drivers.

High drain cells and DD drivers are not good combination for low Vf LEDs like Luxeon V and many new Nichias,Crees... But it's nice too see that it can survive for quite a bit of time under way over spec conditions, most other LEDs just turn blue and die.

The Luxeon V is one tough emitter, it’s still working after all the abuse and after I sliced the dome the dark spot is less visible. I did put a new Luxeon V in the Sofirn but this time I used a LD-B4 6 Amp driver instead.

As long as you use a host with good thermal path it’s hard to get the Luxeon V to turn blue, I have only managed to do it in a Skilhunt H02 with a FET driver.

I have a LD driver with luxeon configured it in DD mode on turbo. on fresh battery it never takes more than 8A.

In the Sofirn C8 I just put together with a LD-B4 using 22AWG wires from the driver to the LED and a high current spring without bypass I get 5.64A on CC and 9.36A on DD with a Sony VTC5A.

Will it be okay to push 7A regulated current with this LED? How will it hold up in the long run with regular turbo runs? External OTP will be done with L4P driver and MCPCB.

7A should be fine although my sweetspot would be 6.
No one knows what happens in the long run until reports are coming in that Luxeon V’s are failing. At least my tests do not tell what happens when leds are overdriven longterm.

Thanks djozz

Pretty much all my Luxeon V lights have lost amps and output - thought this was known well? I'm gonna convert what remains over to something else.