I've got the older version (90lumes), I can ride on pitch black roads on a lower setting than that though. Got abit hairy one night using the Vapex batteries, brightness dipped quickly, 8 miles from home, I had to constantly shine it into the side of the road cause I could not see where I was going.
LD20 is awesome tho, I've used it on night rides before and it beats more expensive torches and also appears as bright as some torches with a higher Lumen.
I'll try the Energizer batteries then the Eneloops if I ever need to.
Does anyone know if using my Energizer charger is gonna damage batteries and is no good? It's what you'd call a "dumb charger" I think cause it charges for only a set time period.