This ceiling lamp from Astro needs one bulb. This model is first and foremost intended for indoor use and the bulbs should be no stronger than 42W.
From Amazon
Astro Ginestra 300 Dimmable Indoor Pendant (Matt Black), E27/ES Lamp, Designed in Britain - 1361001 - 3 Years Guarantee
Lightbulb World
Astro 1361003 Ginestra 300 Pendant Light Grey