Ignition occurs at 0 seconds; flames spread to ceiling at 7 seconds; sprinkler activates at 10 seconds; much of tree is engulfed in flames at 20 seconds; tree continues to burn at 1 minute; tree continues to burn at 1 minute and 30 seconds; small portion of sofa in contact with the tree ignites at 2 minutes and 30 seconds; fire is completely extinguished by sprinkler within 3 minutes and 30 seconds; water from the sprinkler kept portions of the tree below point of ignition from burning, limited the flame spread on the furnishings, and the compartment did not flashover at 7 minutes and 10 seconds (end of video).