Conserving energy is really important. What is the point of having lights on if you don't need them on? Turn it off when you leave! If you're not using them, unplug your lamps! Even if they are off, leaving them plugged in uses up energy that you can save! This applies to chargers and other wires and cables too! If possible, you should convert to renewable energy, like solar or hydro power! If your home gets a lot of natural sunlight, keep your curtains open more and use lightbulbs less! Also, consider changing your lightbulbs to led ones. According to https://ukenergylighting.co.uk/ , "Standard LED bulbs can be up to 80% more energy efficient than conventional bulbs, and waste far less energy than other styles of lighting." In addition, fluorescent lightbulbs contain mercury and other poisonous materials. When these chemicals are disposed of in landfills, they cause damage to the environment. LED lightbulbs however contain no toxins. Look around your house, are there any unnecessary lights on or plugs in the outlets? What kind of lightbulbs are you using?