ETC 490 Source Four 90-Degree Ellipsoidal | Color: White, Connector: Dimmer Doubling Connector (NEMA L515P)The 490 Source Four from ETC is a 90 degree ellipsoidal that combines the energy saving power of the patented HPL lamp with a dichroic reflector and optical quality lenses, for the coolest beam on the market. That means your gels, patterns and shutters last longer and your performance space stays cooler. There's only one Source Four the ellipsoidal fixture that changed the lighting industry. No other light offers such optical brilliance. Source Four's