The RETRO-Passive is a 0-100% phase dimmable (forward and reverse) variable wattage LED 2700K-5000K 80-97 CRI engine designed for SCR, TRIAC, or IGBT dimmers. This fanless light engine is a direct replacement of existing incandescent lamps in a wide range of applications. Specific socket adapters enable simple installation which can be as easy as changing a lightbulb in most applications.