Bonalux square ceiling light from the late 1980s, made of glass and metal.

An original German ceiling light (flush mount) manufactured in the late 1980s by the esteemed brand Bonalux Kalthoff. The design embodies the functional, geometric retro-modernist style characteristic of that decade. Thanks to its unique structure and versatile form, it blends perfectly with vintage, mid-century, and loft-style interiors, as well as classic décor. Construction and Materials: Shade: A thick, square-shaped clear glass shade featuring a layered texture that overlaps—resembling the structure of a Christmas tree—and creates a striking light-refracting effect. Rim and Base: A lacquered metal rim encircling the glass and a sturdy metal mounting base ensure the structure's rigidity and durability. Technical and Visual Condition: Condition: Pristine; ex-display / new old stock. The light has never been used or installed. Functionality: Fully functional and preserved in factory condition; ready for initial wall or ceiling installation. Glass: Pristine condition; completely clear and transparent, with no cracks, chips on the decorative molded details, or scratches. Metal Housing: The structure is in perfect condition; the lacquer finish is free of chips, scratches, or signs of patina. Specifications and dimensions: Manufacturer: Bonalux Kalthoff. Model / Item number: Art. 11351.15. Country of origin: Germany. Production period: Late 1980s. Width: 19 cm. Length: 19 cm. Height (distance from ceiling): 11.5 cm. Light source: Standard, durable socket for a replaceable E27 bulb (max. 60W; ideal for energy-efficient LED bulbs, including decorative filament-style bulbs).