Actually - feeling the heat is a good thing. I'm just wondering what that particular light is drawing current-wise.

I've seen Dealx MS900 draw 1.65A and the plug in geoman's version and see it draw 1.45 off the same battery just a few seconds later.

More than one watt and at least 100 lumen difference! Who knows? One thing for sure, the new MS geo version does indeed have thermal-based current limiting -already have seen it work. Just wondering what might happen on a hot summer night - riding when its already 90F.......