My middle school band director told us that the hum of the lights was B-flat, but that would make A=453, which is rather high. My Yamaha flute is A=442, which i

My middle school band director told us that the hum of the lights was B-flat, but that would make A=453, which is rather high. My Yamaha flute is A=442, which is pretty common. You can always pull a headjoint out (lowers pitch), but there's a limit to how far in you can push it in.