Incandescent Bulb, Bulb Base Type Medium Screw (E26), Bulb Housing Glass, Bulb Shape S14, Bulb Finish Frosted, Color Rendering Index Not Applicable, Color Temperature 2800K, Lumens 144 lm, Light Technology Incandescent, Shatter-Resistant No, Trade Number 15S14/IFBB, Voltage 34V AC, Watts 15 W, Bulb Beam Angle Not Applicable, Rated Life 1,000 hr, Dimmable Yes, For Enclosed Fixtures No, Three-Way No, Light Color White, Rough Service No, Indoor/Outdoor Usage Indoor Only, Overall Length 3 1/2 in These S-shaped miniature light bulbs have a miniature screw base, also known as an E10 base. The base has a 10mm diameter and screws into a compatible socket. S-shaped miniature light bulbs with a miniature screw base are used in flashlights.S-shaped miniature light bulbs have a bulged top that tapers to straight sides where the bulb connects to the base. Sometimes known as straight miniature bulbs, they are small enough to fit into tight spaces and don't draw a lot of energy.