Yes, I know about sheldon's advice. I also know that he was writing for the benefit of those who thought that because they had a rear reflector, they didn't need lights. Dumb. But a hi-vis vest - I'm glad you're planning to get one - is visible from many angles and from big distances, and of course you should have lights as well. If you saw me approaching in the dark - or at dawn and dusk - you'd think you were being chased down by a freaking Christmas tree.

And I wasn't trying to persuade you not to wear a helmet. I don't wear one myself, but the arguments are pretty finely balanced and it is up to you. My main point was that it is cars and trucks that kill cyclists, and making sure they can see you is the most important thing of all.