I've too have done that for a few years. I use a Phillips Saferide on the bar, and a Cygolite Mitycross 480 on the helmet, along with a Serfas Thunderbolt headlight on flash mounted on the reflector stud. These are all in a straight vertical line.

Then on the rear I use Soma Road Flares in my bar ends, a Cygolite ExpiliOn 450 that I converted to a tail light by covering the lens with 3 layers of red tail light tape and it's fastened to the seat post (this makes one heck of a bright tail light), and a Cateye LD 600 on the helmet. The rear is forms a vertical line except the bar end lights spreads out horizontally as well, this I do in the hopes that the motorist will see that the object their approaching will appear a bit wider and thus maybe they will move over more.

A side note, on the rear I have the Soma Road Flares and the Cateye on flash mode but I put the Cygolite ExpiliOn on steady. I do this because a German study showed that a rear red steady light on a bike was safer, but USA study showed that a red flashing was safer, so I thought what the heck I'll do both! I have no evidence that proves that what I'm doing works better, but it just seems logical that it should work better due to the steady light allowing motorists to get a fix and a distance mental picture, while the flashing will attract their attention. Note too that I use a flasher on the front, again to attract attention.