I have a B&M IQ Cyo Premium dyno light and a B&M IXON Premium battery light on my front. I have a B&M Toplight Plus dyno taillight and a Cateye LD1000 battery taillight on the back.

They are all mounted and I run them all at the same time. They give plenty of light. They provide an excellent beam pattern...as one light supplements the other. I don't have to worry about system failures. And I don't have to worry as much about charging batteries as battery failure is not a huge deal.

Both the battery lights run on easily available AA batteries. So if I'm away from a charger for days I can just pick some up at any store.