SLP's extruded Prismatic Pattern 19 lens offers the light control of an
injection molded lens at a fraction of the cost. The 3/16" (4.7mm)
square based male prisms suppress luminance at critical angles and
delivers 92% of the light output to the 0-60 degree zone. PR19 is one
of the best alternatives when brightness control is a consideration but
parabolic louvers are not required.
