Nope, they make peak lumens at around 6A, so 5-6A is perfect. I tested them to 12A and they lived just fine, they just put out the same lumens at 12A as they do at 2.5A except with a ton more heat.
Just curious, are there any multi output (3-4 outlet) drivers small enough for flashlight applications? That would be a good option.
How about RGBW drivers? We can use 1/2/3/4 output or even combine them all.
There are some great branded multi colour flashlights, right?
For the same reason the Cree says that an XP-L2 max is 3A but we run them at 8A+. They rate them first off for non-DTP mcpcb which makes a massive difference. Then they also need a safety factor built in.
Heck I tested the XP-L2 to 15A and it still worked! These latest gen LED’s without bond wires are super tough when mounted on a DTP star and have a good heat path.
Yes, they can handle it.
It’s a matter of opinion and preferences etcetera.
I just don’t like the idea of a modern LED doing less than 100 Lumen per Watt.
5 Amperes is excessive i.m.o.
3 Amperes is still okay for a 219C, maybe 3.5 Amperes.
But with a linear driver you run into problems when the battery can not provide the Vf at such currents.
The party is over pretty soon, even with modern low Vf LEDs.
DD FET drivers and how they’re usually implemented makes matters even worse.
Folks are limiting the current by means of thin wires and what not…
Sure, that’s what you would want when the battery is fully charged, but that’s only a short while…
Yes please.
I don’t mind if it can produce high lumens for more than seconds too (it heats up to unhealthy temperatures darn fast when you drive it hard).
For streetlightings 100 lumen/watt is pretty standard in 2016. Manufacturer are moving to 120 lumen/watt total SYSTEM lumen this year.
To get the most efficient yet as high as possible CRI to the end user, most manufacturers (including Nichia) have been decreasing chip size. Some goes to small chips meant to reduce intensity and better spread of lighting spots, some forms big COB with much higher voltage at very low current.
For example the 757, E17A, and E21A is Nichia flagship at the moment for it’s (own) record breaking efficiency while maintaining one of the highest efficiency AND CRI in the class. AFAIK, Yuji LED still has the best colour quality but suffers with it’s poor efficiency (60-70 lumen/watt is typical).
I hope you are wrong, I am worried about the same thing. The manufacturer assured me it would handle the load… I have not yet committed to using that driver, but I have to find a driver that will handle it. My triple 219C’s at around 15 amps have issues in turbo, I think it is noise spikes or current spikes in the driver and it will drop out of turbo after about 20 seconds. Battery is still up to par at that point. Have tried 30q’s, and high output Panasonic’s and get the same thing to happen. I have tried the mountain FET+1 and the A6 drivers and 1 FET+1 that I built with the Vishay FET. I may have to try one of yours as well. These 219C’s are beastly.