2 B10 bulbs. 120 V. Double life (B10 double life bulbs have a long 3,000 hour average life, last twice as long with almost as much light output as standard B10 bulbs). Lasts 2x longer. Indoor/Outdoor. Life: 3000 hours. Standard base. Recommended Uses: chandeliers; wall sconces; enclosed outdoor fixtures. Operate base down to horizontal only. Safety Circuit: A special design feature of Sylvania B10 bulbs minimizes arcing at the end of the filament life. Made in USA.