>>1963336https://aliexpress.com/item/1005004351289790.htmlI swear by those things, have them on every one of my bikes and gift them out on every occasion. The only inexpensive light I've seen with properly lensed optics, gives a good long focused rectangular light pattern that doesn't blind everyone around you. Also remarkably battery efficient for the brightness you get.
It's not perfect and does need tinkering though. You'd expect that for 15 bucks.
It does need an external battery, a cheap powerbank shell that takes 18650s taped to the frame will do, do some waterproofing on it plus carry a spare cell to swap if you're going far. Also get some way to charge the 18650s on their own if you don't yet.
It doesn't have strobe, but you can use it at low brightness to keep yourself visible, it lasts for a long time.
It's more of a high beam for going fast and relatively straight, the pattern is narrow, you might want a second light with a spread pattern to illuminate the ground immediately around you if you are doing trails (that also solves the issue of strobe). A cheapo regular bike light will do, you don't need much power since you'll angle it down.
You might blind cars if you place it high, it's best placed low on the bike with the light cone angled so the top of the pattern is nearly parallel to the ground. Included mounts are for placement on the bars, you'll need to make a bracket yourself to put it on the fork. You can cut it out of waste sheet metal (soda cans are too thin, but something thicker like deodorant can will do), or make a 3D printed bracket. Or don't bother, it's less blinding than the usual floodlights even when it points at you.
For the rear I use an old battery powered light. It's not bright but it's large and lasts forever on 2 AAs. Don't use strobe at night. If you are riding on the road, offset it to the left (or to the right if you live in wrong hand drive country) so cars think you are further on the road than you are, good safety margin.
