Performance lenses for MR16 spotlights. Fo use with 1536BZ, 1536MZ, 1538BZ, and 1583NC, all sold separately. Lenses are available in corrective blue lens which enhances color and creates a moonlight effect, hex louver lens which reduces overall glare, linear filter lens which creates a vertical/horizontal directional beam, and prismatic filter lens which diffuses lamp beam spread. ETL listed. 2 inch diameter x 0.13 inch depth.