Discharge lamps have specific advantages over tungsten halogen lamps: in addition to high luminous flux and outstanding energy efficiency, they retain their colour throughout their long service life. The main characteristic of ERCO wallwashers is the highly uniform brightness of the wall. The Lightcast wallwashers with inclined reflector are provided with a special flood lens for highly efficient wall illumination.

With this special reflector technology the lamp is completely hidden from the observer. No light is emitted directly from the lamp onto the surface being illuminated.