I feel Monkeylectric looks cool, and I'm sure it's reasonably visible, but I wonder how much "safer" it makes a biker. Something like Spokelit — which appears reasonably "plain" — I imagine, will cause a motorist to think, "Hmm: that looks like a bicyclist. I'll try to be careful"; whereas Monkeyelectric (if it doesn't make a motorist ill with violent spasms...), is something that catches one's eye more than alerts one's senses.

Is there any evidence that just because it's bright and attention-grabbing, it makes you safer on the road; or are we just clinging to the phrase, "Be seen: be safe"?

As for wheel-balance, one could probably address the problem to a respectable degree by placing a second light on the other side of the wheel, diametric to the first; also, by positioning the devices as close to hubs as possible, as far as possible away from wheels' circumferences.