Duraflame Crackleflame 4.5lb Firelogs, provide the ambiance of a crackling wood fire without the mess or hassle. Create a soothing fireside experience with this 4-pack case of crackling fire logs. They light fully with a single match in less than 5 minutes and each log burns for up to 3 hours. You can use this fire log indoors in an open-hearth fireplace or outdoors in your fire pit. Duraflame firelogs light faster and burn more completely than firewood and because far less material is consumed when burning a fire log, significantly fewer pollutants are emitted than a comparable wood fire. A duraflame firelog consumes 80% less material than a comparable duration wood fire and burning fireplace logs instead of wood results in significantly fewer trees cut down for use as firewood.