Understanding the Risks Associated with Pre-Lit Christmas Trees Research by Underwriters Laboratories (UL) suggests that a pre-lit artificial tree can be as big of a fire hazard as a dry natural tree, but personal preference is still the most important element in picking a Christmas tree. After fresh studies confirmed that artificial trees can contribute significantly to the propagation of a minor fire once lighted, the product safety testing agency announced new flammability regulations for pre-lit artificial trees. Trees over 30 inches in diameter and shorter than 12 feet in height will be safer according to the new regulations, which […]