These C-7 size retrofit replacement bulbs are blue in color. They are specially made to be dimmable. They are commercial grade, faceted LED screw-in replacement bulbs designed for traditional incandescent C7 (E12 socket) sockets. They have a 1-1/2" cone. Each has three super bright LEDs encapsulated by a hard-to-break lens (unlike the old-fashioned and very fragile incandescent bulbs). Each bulb consumes 1 watt of power so you can safely connect up to 1,125 bulbs on one 15 amp circuit. Fits directly into existing traditional sockets without extra transformers. Saves up to 90% on electric use. Recommended for computer animated displays requiring dimming. Can also be used in non-dimming (simple on/off) applications. Packs of 25 bulbs.3 internal-LEDs.