I don't own . . . yet! But, after a ride last Wednesday, I was riding up on a rider from about a half mile back as was astonished to see how bright this light was. There was no doubt that there was another rider ahead of me. As I passed him, we talked briefly about his light. Definitely the brightest light I have seen.
If you're worried about people seeing you in low visibilty, night, or high traffic. This is the light for you. This thing is almost impossible not to see! I prefer the flash mode simply because of it's size. I don't want people to misjudge the distance, especially since I work, and exercise nights. You can find cheaper, but you're not going to find better!
RAAM (Race Across America) Solo, I used two of these lights on my rear stays for safety, the best rear light regardless of price, meaning I have tried lights that cost hundreds of dollars and this light is MORE effective than anything I have tried. This light has kept me safe in daytime, bright sun, nights when it was foggy in Alaska or tremendous rains in Illinois during RAAM. Manufacturer Customer service is excellent.
I swear by this light and recommend it to EVERYONE and should be on during the day, especially with the increased traffic on the roads.
Stay safe, Doug Levy completed Solo RAAM in 11 days
