I'm quite impressed with the TLE-DB3 so far. Installed it about 3 days ago, and given my Mag 3D a good workout. The initial drop looks far worse on paper than a real life scenario, I get an output far superior to the stock Mag bulbs after 8 hours usage. (will post photos if needed)
There is the typical maglite doughnut on wide beam, but it focuses really nicely and provides a decent illumination throw at 75-100 metres, depending on ambient light. ( I ran it in dark conditions, got a decent illumination at 100+ metres over a field, but a better lit urban setting, it was only effective up to about 30 metres)
I'm seriously thinking about overdriving it at 4.8v ( NIMH), or 6v (bog standard D Cells), to see what sort of heat / light output it gives.
Overall, well worth the money, easy to install, impressive little mod.