Hey fellow members; i have to following question:
Thanks!
Kdlst your post is not right
Is working now
Bad heatsinking ... This one is build like a big drop-in. All Drop-ins have this heatsinking issue. You can try to put some aluminum foil (?) around the reflector so that the heatsink has more contact to the body 
Ok i just posted the link now.
I've been trying to embed it for almost 10 minutes now without any result :s
Isn't it just copying the embed linkt and pasting it here? Beacause it's not working...
try here dude, I just found them too.
http://www.candlepowerforums.com/vb/showthread.php?t=230854&page=1&highlight=improving+heat
There is a lot more space in this flashlight. This trick only works with P-60 drop-ins/hosts ...
I have a TR-1200 body tube with a 5xR2 drop-in. This drop-in has roughly the same shape and pulls 2,4 amps at the tailcap from two 18650s. It's true, it gets warm mainly on the bezel. I never used it for longer than 15 minutes on high. In doing that, it gets barely over 40°C. The XM-L on two 18650 should not get much higher than 1,5 amps at the tailcap. So I see no problem wit that. Can you check the current on yours?
I have a TR-1200 too ... used the same trick with the aluminium foil. Works great so far.
That would be a b**** to heatsink properly. I would at least try to stuff the head with aluminum foil to help disperse the heat. It might be tricky!
Why don't they make a dual 18650 C8 XM-L? That design is decent.
Would be great 
My C8 works very well ...
Ok thanks for the tips!
I'll try to stuff that head up with foil this evening and see what it gives when taking my dog for a walk.
Should i stuff it with as much foil as possible in thin layers over each other, or should i take some foil, crumble it ,and then put it like that in the head?
As much foil as possible. Wrap it tightly. Air gaps are insulators, you don't want it insulated... Ideally you want solid metal with no air gaps. Use the thickest foil you can find - the sort of heavy foil thing takeaway meals come in is better than thin cooking foil.
Around here most hardware stores sell soft aluminium flashing (0.3-0.7mm thickness). A 10m roll of this stuff would provide a lifetime of heatsinking.
even better would be foil that doesn't have a wax coating on it, like foil for food does. the stuff Tas mentions would be great.
I guess that's another thing that's different in different parts of the world, there's no wax on the aluminium foil sold for food use in the UK.
a lot of the heat will be conducted to the allu. reflector
There are a lot of smaller XM-L flashlights with the same type of heatsinking that run effortlessly
So don't worry if it does not tun angry bleu on you.
If you still worry => use allu foil, can't be bad
Another option besides aluminium flashing is copper tape. Works very well, it's meant for shielding components, but it ain't cheap.
That copper tape might be outrageously expensive and possibly the adhesive might act as an insulator...
I don't know if I would go as far as "effortlessly", since most so far are drop-ins... http://budgetlightforum.cz.cc/node/1243
But yeah, it seems that being better attached to the reflector does help. :)
It would, absolutely. For instance, it was found a while ago that just not having anodizing on threading (or whatever the contact surface is) made the lights 15 times more efficient at heat transfer to the body. That's not a small change. ;)