Commercial Light Spools are the most durable version of Lights currently on the Christmas Market. Commercial Grade Lights are made to meet Professional Decorating standards with features such as UV Protected bulbs, so your color scheme doesn’t fade throughout the seasons, and Single Mold Construction. Single Mold Construction features irreplaceable bulbs that are specially manufactured to resist water & extreme weather conditions. Lights with that construction style still work even submerged under water! Plus, everyone wants to save time and energy with the convenience of unraveling a Light Spool versus spending hours untangles last year’s Light Sets.