Modular system luminaire 'Silica® 21' in a uniform design: as a linear luminaire for ceiling recessing, ceiling surface-mounting and suspended mounting, as a square or rectangular luminaire for integration into any ceiling system and for the refurbishment of existing lighting systems; linear luminaire for single arrangement or continuous row mounting; high-quality powder-coated housing made of low-CO2 produced aluminum; maximum variable modular system in the system dimensions 50mm x 300mm with almost infinite options and design variants; for individualized trunkings, smart lighting systems that can be equipped with individually placed intelligent sensors; housing available as standard in the colours silver, white and black and in three different standard lengths, with the possibility of customization according to the specific project needs and customer desires; lighting technology with various optical systems for all needs in offices, administration and education: ELDACON® L: Lens-reflector optical system: Combination of lens with Fibonacci structure and reflector for homogeneous, perfectly mixed light and even lighting; with design-defining Darklight reflectors to avoid glare; -- wide distribution: for office applications with high light packages and a wide beam angle for large luminaire spacing and thus a reduced number of luminaires; CAT 2 (L<= 3000cd/m²); UGR ≤ 19; -- narrow distribution: through a combination of reflector colour and indirect component as glare-free lighting for VDU workstations, for accent lighting or corridors; CAT 2 (L<= 3000cd/m²); UGR ≤ 19; -- asymmetric distribution: especially for wall and blackboard lighting - walls and blackboards are illuminated uniformly and in accordance with standards from the height of the luminaire down to the floor; ELDACON® P: Progressive prism system with excellent glare control at high luminous flux levels thanks to a new and patented microlens/shield structure: only requires half the luminous area and creates twice as much light; -- wide distribution: for standard-compliant lighting of VDU workstations; CAT 2 (L<= 3000cd/m²); UGR ≤ 19; Opal: opal diffuse cover enables very large luminaire spacing - for very large areas to be illuminated; -- extremely wide distribution; UGR ≤ 22; all lighting technologies are available with direct distribution as well as direct/indirect distribution (70/30); luminaires are extremely maintenance-friendly and can be modernized very easily, the modular design enables easy component replacement: the entire gear tray can be removed and replaced, reflectors and lenses are removable; LED modules can be (easily) exchanged at the ESD workstation: the control gear can be replaced in just a few simple steps; consistently implemented sustainability: All components can be separated in a resource-saving manner and fed into a real circular economy with an extremely high recycling rate optionally with PIR/brightness sensors integrated in the luminaires or separate, between two linear luminaires or at the start/end of the trunking; certification: CE; through-wiring - length: 1,2m manufacture: Siteco type: 59MX70DL10X (or equivalent, suitable for aforementioned positions)