I would have thought the CFL ballast would run in the kHz range, not 50-60 Hz. The DMM appears to be reading voltage, and its input is probably pretty high imp

I would have thought the CFL ballast would run in the kHz range, not 50-60 Hz. The DMM appears to be reading voltage, and its input is probably pretty high impedance, so it may very well be sensitive to the hash from the ballast (the meter's input protection circuits may be rectifying the AC). I'm thinking hoax.