If one bulb burns out, the rest will stay lit.
The wreath comes with 1 plug with end connector which allows you to stack multiple lighted items together (not to exceed 210 watts), replacement bulbs, and spare fuses. This wreath is pre-lit with 150 multi-color lights that are UL listed for both indoor and outdoor use however, the garland should only be used indoors.. They are also equipped with a lamp lock feature, which makes them replaceable, interchangeable and keeps them from falling out.