LED test / review - Cree XLamp XP-L2 V5 40E & U6 40H 90 CRI – High light flux and low Vf, but very huge spread in performance

Which order code?
The yellow corona is caused by the yellow phosphor which covers the whole visible surface. I don’t know how the use of another XP-L2 makes the artifacts more bearable… Only because of the rosy tint?

@gchart: Thanks. :slight_smile:

Thanks for the info :+1: :beer:

Thanks for this valuable information, Dominik.

Same results I have noticed, I really like all the 80CRI second gen CREE LED’s I have tried, (xp-L2, xhp70.2, XP-G3) but the 90 CRI versions all seemed to have a green hue.

so 2000 lumen 90+ CRI single die led, interesting
if you go with triple setup, that means 6000lumen 90+ CRI and 22Amp
i wonder that what’s the problem with such low vf and DD driver, i’m scare it will go over “sweet spot” and broken

In most cases the FET on the driver can’t handle really high currents (10 Amps or more). They got very, very hot in operation (over 120 deg C), even in highest modes. With a standard A17DD_L I won’t go over 7 Amps current on LED.
Second the lifespan of the emitter will decrease, and the more current the more heat has to be dissipated.

You will have losses in light flux (10 to 30 percent) in every light, because of TIR optics, lens, reflectors, no perfect focus and so on.

Thanks for the nice test! :wink: The 90CRI Variant of this LED is also special because of the die size (other 90CRI LEDs with a single die are smaller).

Why is the dize sie different from your last test? You measured 3.55mm^2 for the de-domed variant in that test.

I can reccommend using a Lee quarter Minus green filter (or even better a Lee Zircon) to reduce the green part of the spectrum. It makes it much more bearable.

In my last test I measured the semiconductor (die) size only. But this is wrong, with applied phosphor layer the LES is slightly bigger, as you can see. :wink:

The LED chip itself is always smaller than the LES in the complete LED (with phosphor and silicone). As example, see a EZ1950-p Chip is significantly smaller than the LES of a shaved / dedomed XM-L2 (where this chip is used in).

I updated the LES size measurements and therefore the luminance values.
This affects all newest generation Cree LEDs.

You also added a very nice pic showing the emitters side!

TLF so sorry for your loss… Well I am not :smiling_imp:

Keof3 is the man! Beautiful review :+1:

Important notice:

I updated the luminance values for all LEDs shown in test chart including XP-L2 V5 40E. I could not update the luminance values for U6 40H because I ran out of samples.

To ensure more realistic values for 'real-life' conditions (flashlight use / secondary optics) I established a new testing method to determine the luminance with a SMO reflector. All upcoming and already existing tests will use this method!

Updating of my other tests will be done in the next hours / days.

Hi, wonderful review, does anyone know where to get the 90CRI variant on 16mm copper plate?

Is the xpl2 v5 still the highest bin? And has anyone used them in a triple setup what’s the current and output with a fet driver

I’m pretty sure V6 has been available for years.

I hear W2 every now and then

How much does dedoming lower the color temperature on these XPL2’s?

Is is that people are claiming that they have them? I haven’t heard such claims yet.

DBCustom has had those a while ago if I remember well. They may have come from Cutter.

Are you sure these were XP-L2 and not XP-L?