LPN4 - The LARGE One The large Round Panel Light, with a diameter of 600 mm - 2100 mm, is the flagship of the PN4 family with a light output between 4200 lumens and 18,900 lumens. Available as a pendant light, surface-mounted light and up to Ø 900 mm as a tubular pendant light. Also on this large area as - with all PN4 round panel luminaires - absolutely homogeneous light surface.