autospike,
I have a KL2 for sale in the BST forum. I'm not trying to plug in here, but I thought you might be interested in it. It is a 3W luxeon being run by a Downboy700 with a modified Carley 1.37" reflector. It's throw is similar to that of the Aleph III and will run for about, I suppose, five hours in regulation on the 6 batt, 9v setup of the M6. It won't put out the monster gobs of light that a 5W head will, but it does have a good sidespill and it really reaches out there.