Playboy,
Were you looking to have your KL3 modded? If I understand correctly, you want to maintain the stock current, but upgrade the lux. This sounds pretty easy to me. On the KL3, getting to the circuit is the hard part. Just replacing the LED is easier than it is on a KL1.
A word of advise though. And I am speaking from experience. If you want to stay with the stock current, go with a 1W LED. I have VERY few Q3J's left and I think another is about to be claimed. The Q3J should do very nicely at the stock current, especially in situations involving complete or near complete darkness. You won't loose any runtime either. If fact, you may gain some.
PM me if you are interested and we can discuss options, such as possible overdrive, optics/reflectors and LEDs.
BTW, you may also want to check with CM. He's the guy that got me started and you won't find a better modder. He's more anal than I am about the details. (I meant that in a good way. /ubbthreads/images/graemlins/grin.gif) CM may have more optics options available than I do. I'm fresh out of Fraens and ordering 1 isn't worth the shipping.
Let me know if I can help.