I haven't tried that one, but I did stick a NiteIze LED Maglite bulb in the regular one that comes with the kits. Runtime was stupidly long.
If the LEDs are anything like the LXLM01, it's freaking awesome. I bought one of those when they came out, and not only is it pretty damn bright, it'll run for a couple days on a fully charged battery. I keep it at home for the all too frequent and long lasting power outages.