Wiring new light over kitchen sink

Typically, the white wire is neutral. ANY non-white wire [except green] is hot. Green is typically ground.

Hot wire should go first to a switch or safety device [fuse or circuit breaker]. If this is an unswitched light fixture, the wires will go directly to the bulb sockets. Follow the color codes I just described.

Another solution is to get a continuity tester or ohm meter. The hot lead should show connection to the center contact in any socket.