Wheel reflectors are totally worthless by day and mostly worthless by night. For safety, one needs bright-coloured and/or reflective clothing. At night, a powerful headlamp and bright flashy rear LED display are crucial. Unfortunately, sometimes "the law is a ass," as Mr. Dickens would write. However, although California law officially requires side reflectors at night, I have never been hassled about my lack thereof, probably because I take such great pains to make myself visible in other ways.

I do differ with Forester on the issue of tail lights -- whereas he seems to favour reflectors only, I strongly advocate bright flashing red lights in combination with reflectors.

Pedal reflectors are frustrating -- yes, they can be a visibility-enhancer at night, but rear-facing reflectors interfere with toe clip operation.