duraflame 6lb 4-hr Firelogs, 6 pack Duraflame 6lb 4-hr Firelogs. Fast lighting - lights fully in less than 5 min. Duraflame firelogs light faster and burn more completely than firewood, and because far less material is consumed when burning a firelog, significantly fewer pollutants are emitted than a comparable wood fire. Features Lights quickly ? full flames in less than 5 minutes that last up to four hours Use in an indoor, open hearth fireplace or outdoor fireplace or fire pit Burns 80% cleaner than wood UL approved safety classification for use in UL-listed factory built fireplaces Chimney Safety Institute of America Accepted Product USA SHIPPING estimates delivery times and we work to get your item to you as quickly as possible and within those times, but please know it may take slightly longer than the estimate.