Candelabra base. Length 3.75. Approximate life 1,500 hours. The light bulb that uncovers pure, true light. Filters out dull yellow rays. Makes any room look better. Reds become redder, greens become greener, and oranges become orangier. Bluish finish. Clear, B10 blunt tip bulb. For wall sconces and chandeliers. Card of 2.