I think you'll have to be a little more specific about what you want/need in a light. LED, incan, size, use, etc... There are a bunch of great lights you can find for $50.
The newer one is 2x brighter(current gen LED vs last gen LED).
Look into the light, if it has a LED with two bond wires opposite each other, you have the Luxeon III version. If you see a tiny dome with no visible bond wires, you have the newer version.
If you have the old version of the L1T you can get the L1T v2.0 RB80 or L1D CE. The L1T low is a compromise between close in work and walking. The L1D has a low and medium as well as strobe and SOS. https://www.fenix-store.com/index.php?cPath=22_69_50