What about cost?

I rely on many things to be seen at night: 1) DiNotte 200L headlight (I paid $100 on sale); 2) DiNotte 140L taillight (again, I paid $100 on sale); 3) Fenix L2D Premium Q5 (I paid approx. $60); 4) Amphipod vest (this is the highest-rated reflective vest per Consumer Reports; cost approx. $40); 5) reflective tape on rims, fenders, etc, as well as 2 reflectors on each wheel. I also have an Airzound air horn (cost approx. $20). I'm at the point now where anything else would be overkill.

I have all this because I feel it's a good blend of passive (reflector) and active (battery) conspicuity. In total, I paid just over $300, but I guarantee you drivers can not only see me, but will have time to alter their course to give me the space I need. My life and safety is worth every penny I've spent on this system.

My riding: I try to ride every day. My longest ride of 2007 was 36 miles. I did 3,849 miles in 2007 (my goal was to average 10 miles per day). I commute by bike every Friday, 26.4 miles round-trip. From late-October to the end of February it's dark both directions.