xml2 announced!!!!

No solder pads on the topside :frowning:

The lower forward voltage is great news, although that may be a result of being binned at 85C (higher temps result in lower Vf).

I just thought of something:
When the Uf is lower and we drive them with a linear regulator (AMC7135) we would in fact have more voltage burned off by the regulator.
Therefore the driver will get hotter……

am i making a mistake?

Unfortunately not.

I think it’s time for BLF community to make our own
(buck) driver design that will be more efficient than linear 7135 based drivers. Most of serious users are by now familiar with soldering iron and have AVR programmer so this should be a decent base for further diy projects.

But then the LED itself is converting 20% more energy into light, so that will get less hot :slight_smile:

Who do you think will carry the new XML2 bare or with round base first? Hope I can get the highest bin in a nice tint like the 2B

I wonder if this is the reason Thrunite was blowing away the TN31 inventory…Hmmm

The change from 25C to 85C represents a more realistic approach to binning. Having said that… Crap, crap, double crap. I still haven’t finished my previous XML mods.

Mmm...xml2's....

Yes, I will have some of these as soon as they're available and will run a full test.

Love it! having no current spreaders will look nicer in aspheric.Cree is notorious for releasing higher bins later down the road,so I might wait for the better binned stuff to surface.Other companies are really floundering wirh their new stuff,especially SSC with their z series...fail.I'd like a few to play around with,even if they are lower bin first thing I would do is throw some in my outside security light.

i think it’s 20% more from about 20% efficiency —> 5% more energy into light :wink:

since every new generation of cree leds seems to have a lower Uf this could be an interesting idea.
I’m going to read up on buck converters, i never liked the idea of burning off excess voltage in linear regulators.

Good move by CREE to recapture the miniscule Nichia 219 market

Been lazy about ordering a U3 on copper to pop in my HD2010, and it pays off!

Will be looking for the XML2 in high bin on copper now! Direct drive off a freshly charged king kong with a big jump in surface brightness, this should throw nicely.

Awesome! Did you order it from led-tech or IO?

Cheers!

This is awesome

Top notch information! Cant wait to see them in action.

80 CRI minimum in T4 bin at 4000K, looks and sounds sexy to me. T4 bin XM-L2 should compare nicely to T6 bin XM-L.

I wants one :wink: or 5

I was going to order from led-tech, but will be waiting for the XML2 on copper to be released after this news!

Is this a “real-world’ 20% increase in light output with an optimized reflector and driver? Or will it be realistically more or less?

For example, with the correct driver, let’s say a Fancy Fandy hoo-fire ke-hd-2010-5-897 now puts out 875 lumens with a T6. With an optimized driver and reflector, the comparable light with an xm-l2 will now put out 1050 lumens?

Lower Vf will definitely help the regulation in multi cell lights those can work with a single 18650, like Thrunite TN10-12

Whoops, misread your post. Sorry about that. :slight_smile: