i removed and replaced a surface mounted light fixture with a customer supplied light fixture in upstairs guest bedroom. I also had to replace the box with a newer up to date box that was compatible with the bracket in the light fixture I removed and replaced 3 smoke detectors with carbon monoxide smoke detector combos with a 10 year lithium battery units I installed a whole home surge protector that will protect the customers homes electronics and utilities from potential power surges I separated all the grounds and neutrals that were double tapped in the electrical panel and installed a ground bar in the panel so that the grounds and neutrals were up to code #review