<prompt> Human: I live in the bottom floor of a duplex. I never paid much attention to lights until I started following this thread last month, but since then I have started to look for every possible savings.By toggling a few breakers, I discovered that I am paying the electricity for the lights in my communal basement space. There are three light installations, each with two fluorescent tube bulbs. Theyre left on 247 because the switch is in a weird location and people are lazy.I found a calculator online to see how much they were costing me on an annual basis. Turns out it was 205 worth of electricity per year. We installed a 25 motion sensor light today and I expect to cut that number down significantly. Assuming it cuts the electric usage by 90, I just paid my Netflix bill in perpetuity!Edit: make sure you have permission from the property owner before making any major changes!  <response>: In a rental, most states have laws about communal utilities on an individual renters meter. E.g. in the states I live, if a utility meter covers more than one rental, the landlord must pay the entire bill. Even if its just one lightbulb.However landlordtenant law is highly location specific. Anyone who rents would do well to read up on their local rights and responsibilities. 