Giant Brightbloom Seed > Zonai Headlight
Yes, I'm a cheapskate. But it has worked really well for me so far and Brightbloom Seeds are a dime a dozen so why not use them? If you need/want even more light, just toss a couple more seeds.
I don't know why I didn't think of this before!
Only way to go. The headlights in this game may be the least necessary thing in the whole game.
I always use ultrhand and flip the thing over before attaching the brightbloom seed. I've lost too many hoverbikes before I started doing this.