Oh, I see what you are saying now. You want to see how the brightness in both of them is effected as time goes on. Like do they get constantly dimmer until the batteries die. Right?

I can answer that generally now, but I will have data to show it later. The Luxeon saber has a current regulation circuit so it will stay at max brightness for MOST of the battery run time. The Hyperdyne seems to not have any battery regulation circuitry, so it will be the brightest at full charge then slowly get dimmer until it dies. In short, a Hyperdyne setup appears to be similar in some ways to a resistor driven setup.

It's a great comment and I'll take data that shows that trend on both. Thanks!!