欧州ikeaではこんなスマートLED照明パネルも。

FLOALT LED light panel w wireless control Dimmable/white spectrum 60x60 cm - IKEA
http://www.ikea.com/gb/en/products/lighting/ceiling-lights/floalt-led-light-panel-w-wireless-control-dimmable-white-spectrum-art-10302969/