The Montclair Spruce Entrance Tree will add an attractive accent of greenery to doorway, deck, porch or patio. It is pre-strung with 50 clear lights that remain lit even if a bulb burns out, and is seated in a decorative urn base. This realistic planting can be placed in indoor or outdoor locations. Light string features. Bulb-Lock to keep bulbs from falling out. If one bulb burns out, others remain lit. National Tree Company, as the importer of record, have all the lights on our products tested and certified by UL and they all comply with UL 588.