XP-G R5 upgrade (from XR-E Q5 in an ultrafire C3)

darkmilk

Newly Enlightened
Joined
Aug 25, 2008
Messages
23
Woohoo, I like getting packages in the mail: finally, the backordered Cree XP-G has arrived from Cutter, and even better they got R5 instead of the R4!

So, I couldn't wait to put it in something and the ultrafire is easy to mod, so here it is:

Before, compared with a Fenix L2D Q5:
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After:
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As expected with the smaller package, larger chip the hotspot is wider and there's much more spill light. Ideal for my main uses walking, biking and camping.

Interestingly, the MCPCB is much thicker, more like 2mm, than the one from the XR-E at only about 1mm. However the base of the actual LED package is much thinner, so the total stack height from the heatsink surface of the pill looks very similar. The tiny dome looks a little lost in the big hole in the reflector, I put in a new insulation piece to stop the solder points contacting it. It isn't perfectly centred (new board is 10mm vs 16mm) but given the extra beamwidth it's not an issue.

Next step might have to be a driver which can do 1A to the LED ... maybe, if the AAs can handle it, they already suffer under 1.2A on high.

The color is so much nicer too - looking at things around the house the reds and greens appear normal, unlike the Fenix which totally washes out. Hope that applies to real grass and dirt, will get some outdoor shots tonight.
 
Glad to read that more R5's are being shipped! What will you use for the final host for the R5? Any thoughts about what driver? Asking 'cos I'm going to order XP-G soon and I'm studying available drivers....
 
the xp-g is using the xre reflector right?

Yes, hence the much wider beam and spill - which I think is a good thing, however those after a thrower will need new optics. I haven't figured out what else to put an R5 into yet ... I have a few ideas, and actually kinda like the C3 so this one will stay there and I'll order more, maybe a new torch or two to put them in too, now how do I convince the Mrs? :)
 
Yes, hence the much wider beam and spill - which I think is a good thing, however those after a thrower will need new optics. I haven't figured out what else to put an R5 into yet ... I have a few ideas, and actually kinda like the C3 so this one will stay there and I'll order more, maybe a new torch or two to put them in too, now how do I convince the Mrs? :)

Make her some peanut butter & jelly sandwiches and she will allow you to visit the Sandwich Shoppe - http://theledguy.chainreactionweb.com/index.php :whistle:
 
Finally the outdoor shots:

Ultrafire C3 w/R5 vs Fenix w/Q5:



The color difference is real (white balance locked) and makes the R5 so much more useful for walking/biking. The wider spill and hotspot are clearly visible.
 
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