This Litepanels Nanoptic Lens Set is for the Astra 1 x 1 LED panel. It consists of four flat lenses with nanoptic textures to bend and lightly diffuse the light in Narrow Spot (NSP), Medium Flood (MFL), Wide Flood Horizontal (WFL-H) and Wide Flood Vertical (WFL-V). The lenses convert the powerful open source into a soft light or broad directional fill, delivering flexibility for many applications.