Not by the lighting alone, but also by its visual impact. The challenge to designers is to assemble all functions (lighting being one) that are given to ceilings, walls and floors. The radical simplicity of the geometric forms that characterise Kreon products allow them to express these functions in a graphical form using dot and line. Developed in partnership with Bartenbach Lichtlabor, Ligna is a continuously luminated line developed for Prologe extruded profiles with light outputs in excess of 50%. Crucial for architectural lighting, the flow of the luminance is barely interrupted due to an innovative OLDP (opalised linear de-glaring prism) optic. This optic is set back above the ceiling line to provide an unsurpassed lit effect. Intelligent construction and modulation make tool less assembly and installation into the Prologe profiles possible.