I have a DiNotte 400R - don't think they are made anymore. The next best would be the Cygolite Hypershot 350. With lights this bright it's OK to point them straight back in the daylight, but at night it's better to point them a bit down toward the road, so as not to blind approaching vehicles or the rider behind you. They make a very visible red oval on the pavement, quite effective. One notices that drivers make a wider pass.