First innovation in the world: lighting system, which doesn't need extra ballast for dimmer. SD series are products by Solar Research System which has been developing DIMMER for fluorescent cont, lighting. SD series have been processing to patent of South Korea and worldwide patent. We are not first Institute adding DIMMER to light fixture. All most of existing dimmers are focused on the intensity of incandescent light and have to use ballast for lighting. SD series is new and revolution system. This is first of its kind, dimming product that allows the intensity of the fluorescent lights to be controlled.