Philips Hue's lamp has an IP20 rating. This lamp is first and foremost intended for indoor use, perfect for setting a mood in your living room.
From Andlight
Philips Hue White Ambiance Aurelle Square Ceiling Light Large
Conrad Electronic
Philips Lighting Hue LED lighting panel 871951438264000 Hue White Amb. Aurelle Panelleuchte 60x60cm Built-in LED 39 W
Philips Hue
Aurelle Square Panel Light