Good feedback. I will avoid the 90 CRI. Tint is more important to me.
I now got a decent 60 Amp power supply, so for testing it I sacrificed one of the 4000 K P2 40E emitter I tested in Dec 2017 and went for a crashtest.
In general, the XHP70.2 is very robust and was destroyed at 33 Amps which is very impressive. Above that the current suddenly drops to 0 and almost no more light came out. At 33 Amps it reaches 3784 lm @ 8.38 V and a power of 277 Watts.
The LED how it looks after turning off at 33 Amps. A little bit of a faint glow shines through the damaged dome:
The dome looked like it is literally exploded in the inside. There are cracks, presumably due to massive heat and burning of the LED chips.
It is interesting how the LED looks without dome and phosphor after the crashtest. Two of the LED chips are simply desoldered itself and came off while removing the dome. The other two have cracks and they also looked like they were melted. I never saw this before in this extent.
3 Thanks
Yeah, you killed itā¦
1 Thank
That is impressively powerful, wow!
How come it didnāt reach even close to the same output as the initial test?
That failure is crazy looking, with the shattered dome.
Good question.
I changed my setup since 2017, with other equipment. But I also have the feeling that this LED simply degraded because it was reflowed many many times to different boards (to test them) and als runs several hours (over the last years) at around 10-20 amps. Also it was quite warm sometimes (estimated 100-130 Ā°C Tj)
It was the little sucker who had not an easy life 
1 Thank
Hi would this run well on a boost driver at 1000 lumens on a single cell or are there other floody alternatives? Thanks
Looking at the Wurkkos TS22, it would do about 3 hours at 1000 lumens. That has an XHP70.2 with a boost driver.
Is there a place to by the drivers? I can only find Sofirn SP33S driver.
I assume the SP33S driver would work too. I have the SP33S and I think it does about 1500 lumens for 2 hours (it uses a 5500mah battery and has more thermal mass, but the driver should still work).
1 Thank
Do you know of any other options? I donāt know what to buy.
Simon sells all drivers used in his lights separately at convoylight.com as well. Also, all lenses and LEDs he uses, too. Great source of parts for DIY lights.
As mentioned in the thread, Convoy has a lot of good options that are easy to use and mod.
The modes on his drivers are very basic. He has no E switch option for the XHP70s. I recently received an XHP70.2 from him and the board was full of solder beads around the chip not to impressed with the solderin job. Are 3v LEDs with buck or Fet drivers any much different to a6v with a boost driver?
There is the excellent M21H.
[quote=ā14500, post:34, topic:49020ā]
M21H
[/quotI have recently received a XHP70.2 from Simon adn he has said he has no E switch rivers for them. My options are Sofirn drivers which are available on Alie Expess. Is there a 3v Led that is viable? I really want a nice clean floodey beam.
Arenāt all those with a switch hanging off of them an e-switch driver?
Like the ones for the M26D, L6 o S21E?