TUBE SUS

TUBE SUS is an award-winning suspended architectural luminaire that redefined the possibilities of linear LED lighting. Recognised with an (IES) award for its innovative optical design, TUBE SUS was the first linear LED luminaire to achieve both downward and upward illumination from a single downward-facing row of LEDs. This breakthrough optical system challenged conventional linear lighting design and established a new benchmark for architectural suspended luminaires. At the heart of TUBE SUS is DARKON's proprietary dual-diffuser technology. A concealed internal diffuser captures and redirects a portion of the light output back towards the upper section of the luminaire, where it is distributed through the feature 69mm diameter external lens. This world-first optical arrangement allows light to be projected upwards onto the ceiling while simultaneously delivering highly efficient downward illumination, all from a single LED light engine. The result is a completely homogeneous, dot-free tube of light with exceptional visual comfort and remarkable optical efficiency. The hidden aluminium support structure is concealed within the luminaire, allowing the illuminated tube to appear as a floating cylinder of light suspended within the space. This minimalist construction enhances the purity of the design and ensures the focus remains on the luminous form itself rather than the supporting structure. Beyond its distinctive appearance, TUBE SUS delivers excellent performance with outputs of up to 127 lumens per system watt, making it suitable for commercial workplaces, education facilities, hospitality venues and architectural interiors seeking both efficiency and visual impact. The combination of indirect ceiling illumination and comfortable downward light creates brighter, more inviting spaces while maintaining the clean aesthetic that has made TUBE SUS one of DARKON's most recognised products. The result is an architectural lighting solution unlike any other, combining award-winning innovation, seamless illumination and a striking floating form within a beautifully simple suspended profile.