Currently my setup has three legacy MagicShine 800L lightheads. Two Gloworm 6800 mah battery packs, along with a 4400mah Gemini battery pack. I also have a newer Cygolite 1200L headlight that is helmet mounted. I also have a headlight mount that will allow any of the MagicShine lightheads to be worn as headlamps or on a helmet.

The pre-dawn work commute is 5 miles west and south, with my wife (blind) on a loaded (with her gear) tandem, and then, I either continue on two more miles to my work on the West Side, or turn back and work from home. I have Glaucoma and Macular Degeneration and function pretty much with just one eye that has 20/100 vision. I do not skimp on the light at night. Before every run, I aim all the lights so that they hit a 20' distant parked car at the hubcaps. If needed I can flick the helmet mounted light to pick up branches and other hazards that hover in mid-air, never at the cagers.

IMO o.p. needs at least one light that is helmet mounted, and one that is not. If they lived on the East Side they would see a variety of different ways to mount the bike mounted light: front rack, front fork, fork crown, bars, etc. What you don't see much of are dynamo lights. They originated and are common in Europe, because the lighting infrastructure there is exemplary. In the U.S., not so much. In some neighborhoods in Portland, trees obscure a lot of the ambient streetlighting. Some blocks have just one light fixture for the entire 200'. Carry sufficient light for the worst conditions you may encounter. I also have 'be seen' lights but they aren't the main attraction.