Endon's ceiling lamp has an IP44 rating. This ceiling flush light is first and foremost intended for indoor use and the bulbs should be no stronger than 35W.
From Amazon
Saxby Knight 35W Triple Chrome Plated Adjustable IP44 Bathroom Ceiling Bar Spot Light
Massive Lighting
Saxby Knight 3lt Plate IP44 35w 39168 By Massive Lighting
Home Supply
Endon Knight Bathroom Plate Halogen Spotlight 39168