It depends on how much you want to spend. This is, hands down, the best bike light on the market and what I use. It's visible from 1/4 mile and beyond and is sold as a Daytime Only light, because its too bright to use at night. Cars will see you!
I purchased two light and added the second to the rear of my helmet. I like the Light and Motion because:
- 200 lumen output to be seen day and night. I even turn it on and it can be seen during sunny days of summer in the brights southwest skies of NM.
- Micro USB rechargeable
- charge last between 4-32 hours depending on settings. I top off once a week after 45-75 miles of riding per week.
- has a pulse flash instead of the super fast blinking
- has a amber follow light only feature you can turn on so you don't night blind if someone is following you
Don't get the Vis 180 Micro because I had a hard time turning this light on/off with the power switch. Returned the Vis 180 Micro after several replacements with the same problem.