Originally Posted by
DocLiv
This is what I use. It's very bright! It has 6 modes, and one of the flash modes is 600+ lumens. Even on the brightest sunny day you will be seen with this. I use it at night a lot and it's nearly as bright as a car headlight.
Cygolite Metro 550
One of the best features of this is the strobe function that is primarily steady, with a slight hit to strobe. Full strobe can be seen and is noticeable, but you cannot pinpoint where the light is (for example, Coast Guard rescuers can see a strobe a long way off, but then cannot pinpoint you very easily and ask that you have a steady light). Try it yourself when approaching another cyclist that is on full strobe. I bet you cannot tell how far they are away from you (depth perception).