I've got reflective sidewalls on the tires (Panaracers and Michelins) on both my road bike and my commuter.
You can really see those things shine.
Also, a helmet light is good ... you can aim it where you need it to be seen. I've got a lightweight flashlight up there, running on hyper-blink.
I disagree with the notion that side illumination is worthless. That aside, you can see the reflective sidewalls from well beyond 90-degree angle.