How do you change an outdoor sensor light fixture photocell?

To change an outdoor sensor light fixture photocell, first, turn off the power at the circuit breaker to ensure safety. Remove the light fixture from its mounting, typically by unscrewing it from the wall or ceiling. Locate the photocell, which is usually a small cylindrical or rectangular component, and disconnect the wiring by unscrewing it or unclipping it. Replace it with a new photocell, reconnect the wiring, and reassemble the fixture before restoring power.