CIELOS INSTALLATION 27 Maintenance : Its modular design alone makes a CIELOS luminous ceiling far easier to maintain than a conventional luminous ceiling. Magnets and retaining cords are another plus. magnetic catches ensure maximum safety: no catch can be forgotten, and the glass cover fits perfectly on the housing. The special saturated During luminaire maintenance, make sure that the glass optic is slid out straight by using a suction cup – ideally by two persons. The glass optic and mounting frame are a sealed unit which is simply suspended from the safety steel cords for mainte-nance purposes. Strong colour filters Magnetic catches have one sig-nificant maintenance advantage: even a CIELOS unit that is sur- rounded by other modules on all sides can be make it possible to produce extremely expressive lighting scenes. Their colour intensity is many times higher than that of commercially opened individ-ually. available coloured light sources.