Last night the moon was so bright that I was able to ride for long stretches with my light off.
I am lucky to have a 20km loop with no vehicular traffic near my house, so riding without a light is only a danger to my own stupid self.
For when I need a light, I ordered a pair of AAA battery powered flashlights that I connect to my handlebars and helmet using rubber bands made from old inner tubes, and tape.