This lamp from Paulmann is made up of plastic. This ceiling flush light is mainly intended for indoor use and the bulbs should be no stronger than 9W.
From Amazon
Paulmann 92388 LED panel recessed luminaire Veluna VariFit IP44 warm white 125mm round incl. 1x8.5 watt ceiling luminaire satin ceiling lamp plastic living room lamp 3000 K
Conrad Electronic
Paulmann 92388 EB Panel Veluna VariFit LED recessed light LED (monochrome) 10 W Satin