if you want a medium size flashlight with lots of throw why the TK40 and not the more recent TK41? the TK21 is much smaller and lighter (and cheaper) has got a surprising output and a very usable beam, unless you want to light up things farther than, say, 150 m. i'd dare to say that it does more or less the same work as the TK45 being 1/4 of its size and weight (max output of course is weaker, but the beam is similar at 20-30 m)