I very occasionally ride with one of those head-mounted lights, not made for cycling. One of the modes is a single LED in the color red. I like this for viewing my handlebar computer or watch because the LED is not bright and won't mess with my night vision. It is bright enough for me to read by, and the red color seems to make it sharp. I got my light at Costco. Recently, I got my boss to buy me one for use at work, and it has the Energizer name on it. This light also has a red mode. Each model uses three AAA cells, which I don't love, but it's OK, especially since these things don't get heavy use.