i got my lights from eBay sellers. they have flashing modes (7) on the back and sides, red led. I have a helmet mounted led light, 2 front power-beams (led) and 1 central led light that also stands out (white). i have been told that i am not the most lit-up rider in area and am waiting for my 4 sets of x-mas string lites (led x 12 string lights each) to change that. i'm hoping for a real spectacle!
if you ride at night, light it up!