36F with thin high clouds & a big 1/2 moon shining down at 6AM today. Enjoyed a quiet ride out South Bay road & when I turned onto Martin Way I could see a blinkie about 3 blocks away. I was gaining steadily & could see it was 2 bikes now, then on a dark stretch where the road passed over a wetland, saw another rider right in front of me on a mt bike, dressed in dark clothing & no lights or reflectors showing. I passed him & caught the other riders as they turned toward St Peter's Hospital. While I was waiting for the red light, lightless rider arrived. My Spanish was as bad as his English but I convinced him to accept one of my blinkies & clip it to his hip pocket. He smiled & thanked me then turned right & rode off to work, but now visible.