Duraflame 4577 Ultra-Premium Firelogs, 4.5-Pound, 6-Pack Burns with bigger, brighter flames than regular fire logs Burns 3 Hours + (with bolder flames compared to similar size fire logs) Made with a high-performance blend of waxes and renewable, recycled biomass fiber Easy-light ignition system lights log quickly - reaches full ignition in under 5 minutes Cleaner Burning - Produces 80% less emissions than an equivalent duration wood fire