LED surface-mounted ceiling luminaire for direct mounting, closed housing, cover on top made of plastic, high gloss white (RAL 9016), diffuser panel made of acrylic glass with conical indentations for directing light and reducing glare, 340 × 340 mm, 6 mm material thickness, with rounded corners and all round chamfer, both sides matt, suitable for workplace lighting in accordance with DIN EN 12464-1, light distribution approx. 98 % direct beam, wide beam, version with integrated converter for connection to (existing) 230 volts ceiling outlet.