Nordlux's ceiling lamp is made up of plastic. This ceiling flush light is mainly intended for indoor use and 15W is the maximum recommended wattage for bulbs.
From Lampemesteren
Nordlux - Oja 24 Kattovalaisin 2700K White Nordlux
Conrad Electronic
Nordlux Bronx 24 47246001 LED panel 15 W Warm white White