Recessed LED square downlighters. Recessed square luminaires constructed from electro- zinc coated steel, giving an elegant, low-profile appearance. Available with white, black or metallised polycarbonate reflectors, the Tetra integrates seamlessly into a broad range of interior environments. IP40 as standard with IK10 versions available for added durability in tougher environments. Applications: Ancillary areas, circulation, toilets, changing rooms, reception areas, office break-out spaces.