Hearing aid batteries last anywhere between five and 14 days depending on the above factors. You will know it's time to replace your hearing aid batteries when the aids start beeping. One solution to save money and make batteries last longer is to purchase rechargeable batteries.
To clarify: you have a main panel with a 60A breaker. That breaker feeds a subpanel which has a 100A main breaker and then some smaller circuit breakers in the sub-panel. If more than 100 coulombs of charge per second flow through the sub-panel main breaker, it will trip and cut power to the subpanel breakers.
Find the circuit breaker that is connected to the electrical outlet or light fixture near the cabinet where you are going to install the fluorescent light. Measure the amperage load the circuit breaker is currently under with a multimeter.0. Hold the white wire end of the fluorescent light fixture together with the white wire end of the electrical cable and twist them together. Screw an electrical wire nut onto the twisted ends of the white wires and fully cover the exposed metal of the wires with the wire nut.