Luckily for most of our customers, the need to change a light bulb, at least in a heating unit, occurs only every 2 to 3 years because most brands include long-life light bulbs within their products. Additionally, most products use LED lighting to create the flame effect, which never need to be changed. However, if you do own an electric fireplace that uses a light bulb to create the flame effect, the warning signs to change a light bulb are similar to the scenario listed above as most electric fireplace owners notice dark spots in the flame or a decrease in clarity within the log set. Finally, all light bulb specifications are listed within the user’s manual upon purchase and can be purchased at any home improvement store. If customers are worried they have misplaced a user manual, they need only to access our website, select a manufacturer and search for their product in the provided list.