I wear a bright yellow reflective vest, reflective ribbon on my jersey sleeves (and if I'm wearing pants reflective ankle bands), two white LED lights on the front, two red LED lights on the back and these:

The bar end lights have been fantastic. I'm sure it makes it easier for car drivers to judge how much room to leave when going around me and they are somewhat visible from the sides, which is a bonus when going past side streets where a car could potentially pull out on me.