Don't know HDS as I'm new to this, ahem, "hobby", but I have a new L1. I keep an F04 diffuser nearby, and on it if I go for a walk late. With the F04 diffuser the L1 gives me 4 choices of beam, and plenty of output and runtime for me, given that it's only sipping on 1 batt. That said, I got an A2 yesterday 'cause I like two stages and love the throw of the incans, for identifying the occasional unidentified 4-legger across the street as I walk/jog.
Spent $12 on the F04, and it didn't change the pocketability of the little versatile L1.
Jeff.