The best? Lights and Motion's SECA 700 Ultra. Since I have to ride after dark because of my work schedule, I need a reliable, high quality light with a longer run-time. I need a lamp that allows me to see and to be seen. This one is the best---in fact, the battery does not have a decreased run time in cold weather, which has happened with other systems I've used. Be advised that it is not cheap.
My back up headlight is the Di-Onotte Li-on that another poster recommended. It's ok, but I'll probably replace it with a L&M Stella eventually.
I'm a big fan of L&M's products and the company. They've done right by me on several occasions.
Tail lights? I clip several smaller red lights on my seatbag . I purchased here at TE--they can run steady and have a variety of different "flash" patterns. They take AAA batteries and work like a champ.




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