I use this bike light only in the city, where the roads actually at least a little are always lit. But the brightness of this lamp reaches definitely. I opted for the Roadster and not for LIGHTster because it is small, I better find the battery lock and I find even the appearance more beautiful. The LIGHTster is brighter for sure, but as I was this use of the city for me is not a criterion. Back to Roadster: It is very well made, can be easily unhooked and the holder is also very well made and is firmly on the handlebars. For longevity, I can not say anything yet. But I guess that they will keep long due to the good processing The lamp is very good for this price and recommended.