"Turn off the light" refers to the action of switching off an electric light source to stop it from illuminating a space. This is typically done using a light switch, which can be found on walls or as part of a lamp. Turning off lights when they are not needed helps conserve energy and reduce electricity bills. In addition to saving energy, turning off lights contributes to environmental sustainability. By using less electricity, we decrease the demand on power plants, which often rely on fossil fuels. This simple action can help reduce greenhouse gas emissions and promote a healthier planet for future generations.