jump...
i know this is a tech forum..
i'm not an engineer, but a pilot of many years...
we would ( instructing ) only allow lights with brakes off and off again with brakes on...( an in that i also mean holding on the taxiways or runway.)
there may be other times ( say facing opposing traffic if you are the one taxying ) when it may be desireable ( instead of blinding the other pilot ) to go to taxi light only for short period...we always use both lights ( taxi and land ) at the same time . this prevents a pilot having his / her head in the cockpit for too long trying to figure out which is which.
by the way ...one of our guys came up with the idea that rotating the light ( usually its the hot landing light that used to blow on us ) so that the filament was vertical not horizontal...gave us much longer life..
it was not in a 206...so do'nt know if the mounting gives you that option...but for what its worth....
gear up..
the dean.