You need to know the difference between a 240 volt outlet and a 120 volt outlet. Do not (and I repeat DO NOT) try to jury rig any connection to a 120 volt appliance or fixture to that outlet.
Oh yes the "Kill-a-Watt" is a 120 volt device. Enough said.
Oh yes the "Kill-a-Watt" is a 120 volt device. Enough said.