This 3.5 watt CA10 flame-tip light bulb uses Archipelago's patented driver-free LED technology. Operating on AC (alternating current) instead of DC (direct current) the LEDs within this bulb require no driver to make a voltage conversion. This means the bulb's 50,000-hour life is not limited by the life of a driver! No driver also means the bulb is smaller than other LED light bulbs since a large aluminum heatsink is not needed. Use this bulb to replace any 25 watt incandescent CA10 in decorative lighting fixtures, indoors or outdoor (enclosed fixtures only).