Traditional streetlights, which get energy from the electric grid, cost more in installation and long-term costs. They require trenching and a grid connection, which cost more to do than batteries and solar modules for a solar streetlight. Additionally, traditional streetlights require paying for a monthly electric bill and more regular maintenance, while off-grid streetlights only require minimal maintenance and battery replacements. Energy from the electrical grid mostly comes from coal, natural gas, and nuclear - fossil fuels which are going up in price. The technology in solar streetlights is reducing in price, meaning that the cost benefits will increase over their 20-year life span.