The Tracer looks good. In fact, I think I've seen it and liked it.

Lighting up the ground doesn't seem to help. Some of the bikes in the Citi Bike program have a green laser which draws a bicycle on the ground in front of the bike. It's not noticeable at all unless I look for it, which I do, but who else does?

I use a Nite Ize Spokelit in my rear wheel. It's not very bright, but because of the motion, it's extremely noticeable. People tell me they notice it and admire it. I tried it in my front wheel, and it was too distracting for me.