I use the Moose coil with a voltage stabilizer, I light the Acerbis twin lamp/number plate. It does dim at idle and get brighter when revved. My light is always lit to warn oncoming traffic. I do use it once in a while at night, but usually just to get back to camp. If I were serious about night riding, I would buy the big E-line system, with helmet lamps, lower fork lamps and the BIG headlamp.
The Moose coil requires milling about 3-4 mm from the stator bracket, however it does line up with the existing holes. if I did not mill the bracket, the coil would have rubbed the flywheel.
John