I'd also avoid the higher rated H7 bulbs as they seem to not last very long. My guess is the housing for the low beam does not let the bulb keep as cool as it should and that excess heat causes failure, or one of several other reasons. I have gone through 3-4 low beam bulbs so far at only 21K miles.
F800GS Mag/Black 2009 "Faucon GriS"
Farkles; Garmin GPSMap478 in a TT cradle, Airhawk seatpad, Pivot Pegs, SW-motech bars, MOD skid plate, Altrider headlight guard, HDB handguards, Maier Mudguard.