If one bulb burns out will the rest of the lights stay lit?
Yes, if one light goes out the rest will stay lit. With our 1 piece construction light sets no further explanation is required. However, with respect to our Flex-Change line of lights, the entire set will not go out if one bulb fails but all bulbs must be in their sockets to complete the circuit or the set won't light. Thus, if one bulbs goes out on a Flex-Change light set you must leave the bad bulb in its socket or the rest of the set will not work.
All of our LED Christmas light products are designed to eliminate the age-old and frustrating hunt for the mysterious dead bulb on the light string that causes the entire set to go out. As a practical matter, LED lights really don't burn out in the same manner that incandescent lights do. Incandescent lights "burn out" because the filament eventually burns up. LED Christmas lights have no filament to burn out. However, LED lights will start to experience a drop in lumen output or brightness after 50,000 hours or so.