Luminaire housing made of 0,8mm sheet steel, white powder coated finish (RAL9003). The diffuser with light-reflecting longitudinal grooves is snap-in the housing, additionally fixed with steel springs. Diffuser is closed from both sides with the endcaps. End caps for the version IP54 are made of 1,5mm sheet steel, completed with glued gasket made of microporous synthetic rubber. IP54 endcaps are tightened by two dropped screws.
Special yellow version tailored for the process of Photolithography. This version has integrated yellow foil, which completely block wavelengths <500 nm. At the same time, wavelengths > 540 nm (which correspond to the maximum sensitivity of the human eye) are sufficiently transmitted by the yellow foil. Both conditions leads to good light levels in photolitography labs with reasonable energy consumption.