Avista is an advanced LED light engine designed to retrofit traditional and post top luminaires, and for integration into new luminaires. It is unique, with a completely sealed LED optical chamber, and Avista offers cutting-edge optics with extraordinary output. Simple to install with adjustable height levels, Avista allows you to position the light where you want it for maximum performance. A super-efficient, economical energy saver, Avista takes exterior LED lighting to the next level in both comfort and performance.