While on, if I half taps 5 times it does nothing. If I half tap 1 time, it still does nothing. Same dim feint glow. No combination of half taps seems to change anything.
As I said, it can take a while to get a hang of it.
I doubt it's DoA.
5 half taps won't do anything, at least not visibly. The only things that's going to do anything visible is single half taps.
Someone else that ordered a unit with a multi-mode driver will hopefully chime in with some tips.