SBF 

SBF AG, operating via its subsidiary SBF Spezialleuchten GmbH, designs, manufactures, and distributes specialized lighting and ceiling systems for both the interior and exterior of rail vehicles. The company primarily caters to manufacturers of railway transport. Their product portfolio features comprehensive interior and exterior illumination, in addition to ceiling panels, engineered for a variety of trains including trams, subways, commuter trains, regional services, and high-speed rail. Established in 1862, SBF AG's principal office is situated in Leipzig, Germany, and it functions as a subsidiary of ELBER GmbH.