The ETC Source 4WRD LED (Watt Reduction Device) is an innovative, non-destructive retrofit kit designed to convert existing Source Four incandescent ellipsoidal fixtures into high-efficiency LED luminaires. This device replaces the traditional HPL burner assembly, drastically cutting power consumption and heat output while maintaining the fixture's original optics and accessories like lenses, shutters, and pattern holders. The upgrade takes less than a minute, providing significant energy savings and eliminating the need for frequent lamp replacements, thus reducing maintenance and operational costs. The unit supports both DMX control and traditional line dimming, offering versatility for various theatrical and architectural lighting installations.