Trying to decide on which one would be best as a headlight for my bike. Does anyone have any experience or know why one would be better than the other?

https://www.amazon.com/gp/product/B00...A1ZADTA4LIX783

https://www.amazon.com/gp/product/B00...A1ZADTA4LIX783

the one without the belt clip. The belt clip gets in the way of the lockblocks...

I would go with the 502. It's a little heavier and the clip can be removed if it's in the way.

If you already have 18650 cells and charger I would look at some of te newer 26650 lights.. They put out 200-400 more lumens than the smaller 501 models. The great thing about the 26650's lights is that they come with a tube so you can use your current 18650 cells while you decide whether or not to move up to the bigger 26650 batteries.

the single cell models work fine in lockblocks and the extra output is very noticeable. If and when you move to 26650 cells you can expect 2+ hours of full power output.

https://www.ebay.com/sch/i.html?_nkw=...&_osacat=16037

The 26650 lights are very nice, but just too large to my liking. I've been very happy with my C8 (https://www.kaidomain.com/product/details.S009844) on the bars. I get two 40 minute rides on a charge.