Cree XR-E P4 to Q5 upgrade

JohnR66 · Aug 1, 2008

I have some flashlights that have Cree XR-E P4s on them and I'd like to upgrade them to to Q4 or Q5. They are on the "star" shaped boards. I see Dealextreme sells these.

Is a P4 to Q4 a visually bright enough to make the change worthwhile for those who have done it? I though I read somewhere the voltage on the Q bins are higher.

Is Dealextreme a trustworthy place to buy the LEDs? (Are Q5s actually Q5?)

TorchBoy · Aug 1, 2008

JohnR66 said:
Is a P4 to Q4 a visually bright enough to make the change worthwhile ...

Sorry, I haven't done it, but IMHO no. There's really not much percentage difference in output at all. Maybe, possibly, P4 to R2 might be worth doing, but :broke:

may be an issue there.

jmw19 · Aug 1, 2008

Well, I modded my Fenix P2D, with a presumed P4 greenie, to an R2-WG, and there's a definite difference. Here's some basic beamshots: The left is a 2008 Olight T15 on high, the right is the Fenix on Turbo. P4 on top, R2 on the bottom.

So, I'd say the Q5 might be worth it, but an R2 is noticeable.

JohnR66 · Aug 2, 2008

Thanks for the feedback. Looks like R2 is the way. I might try a Q4 in a cheap light since they are only $5 at DX. I wonder if the DX ones are the greenish white color ones with the silver around the die. I bought Coleman light with that and the beam color is almost yucky.

TorchBoy · Aug 2, 2008

DX had some Q3s here (now sold out) but where do they have Q4s?

shakeylegs · Aug 2, 2008

I see Q5's and P4's - $7 v $5. At $7 dollars, a Q5 upgrade is worth a try.

DM51 · Aug 3, 2008

You posted this in B/S/T, which is the wrong place for it.

Please familiarise yourself with the different sub-forums and the categories of topics they cover.

I'm moving it to Homemade & Modified.

Cree XR-E P4 to Q5 upgrade

JohnR66

Flashlight Enthusiast

TorchBoy

Flashlight Enthusiast

jmw19

Newly Enlightened

JohnR66

Flashlight Enthusiast

TorchBoy

Flashlight Enthusiast

shakeylegs

Enlightened

DM51

Flashaholic

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