I just received my second 2 L TT. I also have two 1 L's, they are, well, great.
I just returned from a vacation at the beach with my grandkids; they went through two sets of batteries in the 1 L's I let them use. Lots of sand crabs are having nightmares about the hunting skills of the little rug rats (all crabs were returned to their home).
For the GROWN UPS, the 2 L TT is MUCH brighter with the Xenon, brighter with the 3 LED's and has much increased run time with either.
I have all of the TT's (except the 2D) and consider them all around lights of the best quality. The price is simply unbelievable.