Light source R640: LED 1500 840 R1240: LED 3000 840 Ballast Fixed output (HF). Body material & colour Housing in extruded and die-cast aluminium. Phosphor-chromated for extra protection and aouble layer polyester powder coated paint finish. Available in two different colours; white (RAL 9010) or aluminium grey (RAL 9006). Tempered front glass. Silicone gasket. Screws and brackets in stainless steel. Mounting For recessed installation in ceiling thickness of 1 - 20 mm. Connection Supplied with 70 cm pre-assembled rubber cable. Optics Medium beam 30° (MB). Narrow beam 15° (NB).