Grid is a square ceiling-mounted luminaire integrating four effective spotlights. By a special LFO lens, the light can be focused to a minimum of 8 mm at the light exit opening, and then be re-expanded into a light beam of 30 or 55 degrees by the very same lens. This leads to excellent glare control and thus contributes to the improvement of visual comfort. The powder-coated surface of the luminaire body is optionally available in black or white.