Wow, that's using a shotgun to kill a fly...
Honestly, for my bike riding on road, offroad, or even offroad trails, all I needed...
Road/Offroad: 15w flood, 15w spot. Spot at the front edge of the flood, both on handlebars.
Offroad trails: 15w flood on handlebars, 15w spot on helmet.
These are fairly old incan lights, 7Ah battery, runtime of around 2.5h with both on, about 4h with just one IIRC.