Currently I use the following on the rear

Cateye LD610R mounted on the rack. (Flashing)
Cateye something mounted on the seatpost (Solid)
Smart superflash mounted on the rack. (Flashing)

On the front I use a
Fenix LD20 mounted with a lockblock (solid)
Smart 3 LED in flashing mode

I usually wear a hi-vis vest and have reflective material on the sides of the mudguards. Since I've done this I've had very few occasions where people haven't noticed me immediately. As a real plus at least two drivers have complained that the rear lights are distracting and very bright.