SKYWLKR,
It would take an act of God! This question has been asked a few times before. Since all the electronics are potted in the head and the reflector is part of the head, modding it is not possible. You can find info. on the current output for a given light level by searching in the Arc forum here. Keep in mind that they are either calculated values or measured current draw from the battery. Since you can't get to the electronics or LED leads, a proper current reading can't be measured at the LED because the circuit can't be broken. Also, a good number of Arc4+'s are made with LuxIII emitters in them already. That info was posted by Gransee some time ago also in the Arc forum, or the Arc FAQ I believe. Hope this helps.
Brandon
