Our NEW RETRO-Fusion™ is our smallest profile version of the RETRO series. It offers all of the same reliablity of the RETRO-Classic™ series in a smaller package. This is a 0-100% phase dimmable (forward and reverse) variable wattage LED 2700K-6500K 80-97 CRI engines. They are designed for older SCR, TRIAC, and IGBT dimmers systems but are compatible with newer dimmer systems.