Why is it that I have never seen fewer than four employees changing a lightbulb on the platform? Today at Powell, there were three standing around, with one up a ladder staring at a socket. After a while, he walked down after not having done anything. After about a minute of (apparently) shooting the breeze, they slowly walked on to the next fixture. Perhaps they needed a fifth worker to go and fetch the bulb? (The last time I saw a similar scene at 12th St Oakland, there were four people standing around, and the one on the ladder was actually installing the bulb).