National Tree 50 Bulb Outdoor Clear Illuminate Light Set with Green Wire and 36-Inch Lead Wire with 9-Inch Spacing and 2 Spare Bulb (LS-809-50) 50 bulb clear light string featuring Base-Lock to secure bulbs in sockets String remains lit even if a bulb burns out. Set includes 2 spare bulbs and fuse. 37 ft. lighted length with 9" spacing between bulbs For indoor or outdoor use No end connect plug