Nordlux's pendant lamp is manufactured from metal. It is designed for indoor use and as for the energy efficiency class, it's C.
From Amazon
Nordlux Link Clyde 2213550101 Hochvolt-Schienensystem-Leuchte Link LED 4W LED EEK: F (A - G) White
Conrad Electronic
Nordlux Link Clyde 2213550101 High voltage mounting rail light Link LED 4 W LED (monochrome) White