I bought this light to use on gravel trails with no street lights and road with lights. Ravemen PR1600 does great job. I love the remote to switch back and forth between two modes. especially with a remote. It is not the brightest but I believe it is a good compromise to not blind the oncoming traffic or fellow cyclists. When you ride with drop bar and change to trail mode, a beam pattern is such that it shows the shadow of your handlebar on the side. But this doesn't really effect your riding. The fact you can charge my phone is a plus just in case. The battery life is as stated.
needed a new bike headlight and wanted to get one that is compatible with my garmin edge 530. like the fact that it sits under the bike computer and off the handlebar. also, like on the sides it shows the illumination so you are not leaning over the handlbars to see what light mode you are in. it does work automatically and nice it shuts off automaticallty when you put the computer in rest mode. especially like the flashing mode while riding in the daytime. the battery deplete after about two hours.
This is a very nice light, bright and well built. It also has a good battery reserve, lasting for multiple long rides in near-freezing weather. It is too expensive by itself, however. The price only makes sense if you have a Garmin set for it to integrate with. It can then change brightness, mode and distance based on speed and ambient light. I have an Edge 820, and the rear radar, and the full set works well and is worth the cost. Of course, the one problem is Garmin's tech issues (ridiculously clunky if not inept for a tech company), but once figured out (or worked around), it works well.
This is, without a doubt, one ofnthe best purchases I have made. I ride in a city where most streets don't have bike lanes, so it used to be a constant craning of the neck to check on traffic. The radar on this light is amazing. It is highly accurate and gives a city block distance of warning of approaching cars. I never look back now. I ride how I want, and pull to the shoulder when the radar beeps. An incredible experience. Only issue is with integration with my Edge 820 (it won't connect unless another sensor first connects, Garmin is no Apple) but once it does, it is perfect.