I agree with cyccommute by needing a brighter light in well lite areas. Just like daytime lights need to be brighter if they are going to be seen. Part of my commute is on a busy street with a lot of shops and cars. I bump the intensity up so my lights are not lost in the headlights from cars coming up behind me. Then when I turn onto the poorly lite street and can drop the intensity and have more then enough light to see and be seen.