I have been using the Fenix TK70 - I originally bought this light to replace a corded q-beam as it is as bright (2200 lumen) easier to maneuver and served dual purposes (i.e I could jump out of the car and take my light with me. Also on 4 rechargeable d batteries it ran for 2 hours at 2200 lumen and 5 at 1000 lumen.

As you can see it left a lot to be desired for walking

Well I used some tape, plastic and an old flash diffuser and now I get this output. This things lights up 20 yards out as bright as day.