I've been running a mix of lights from Cygolite and Knog on my night rides.

On the front
Cygolite Dice HL 150 in flash mode from handlebars
Cygolite Dash 320 pointed far down road on solid mode from handlebars
Cygolite Hotrod 110 on solid mode on the front fork
Cygolite Metro 420 with a modded wide angle lens pointed into my general view area on solid mode on my helmet

On the rear
Cygolite Dice TL 50 on flash mode on seat tube below seat stay junction
Cygolite Hotrod 50 on solid mode on left seat stay
Knog Blinder Road on flash mode on the seat post above the collar

I'll also sometimes clip an old blackburn mars 3.0 light to a jersey pocket if i've gone out without my Rapha Brevet vest on, but the vest does a good job of providing reflective accents to my body while riding

I find the combo of flashing, and solid on the rear works well, and the multiple lights up front gives me a wide view