I took delivery of all three models of Lezyne lights last week.
I night ride a lot (at least twice a week) until now I’ve used stuff I’ve either made or imported in bulk. My current helmet light is a homebrew single XPG with narrow lens, running at about 300 lumens, with a two cell battery strapped on the back of the helmet.
The MiniDrive was the first I unpacked, so I cabled tied it onto my lid (no official helmet mount yet) and set off.
Build quality was excellent, and beam was nice and tight – ideal for a helmet light. The light is rated at 150 lumens so I wasn’t expecting miracles, but it was surprisingly good. I’d say the Powerdrive would be close to ideal, although I haven’t tried it on the lid yet.
They use off-the-shelf protected cells (18650 for Power and SuperDrive, CR123a for MiniDrive) so spares / replacements are ridiculously cheap too.
If you’re in the South Glos area and want to play with one, let me know.