Portland Design Works' Danger Zone Taillight will enhance your visibility like the beacon on a jetfighter with two 1/2-watt LEDs. It boasts three modes and includes seatpost, seatstay and backpack mounts, too.
This light has amazing output, and I immediately felt more secure with this at the rear versus my previous blinky, which I thought was decent but I knew I could find better. I run both them now, the old one on solid, and this one on blink.
Bottom LineYes, I would recommend this to a friend