Philips demos Notification Center widget on iOS 8 for controlling Hue lights
Philips Hue App Expands to iPad, Gains New 3D Touch Features - MacRumors
Hue Widget - Apps on Google Play
Now control your Hue lights with a widget in the iOS 8 Notification Center - The Gadgeteer
Create your own iOS widget with iConnectHue within minutes! - YouTube
How to Add Philips Hue Widgets to Your Android Home Screen
I'm sorry, but how on earth is a Siri shortcut better than the widget?! Top one being the shortcut and lower one being the widget that they have now discarded in 4.0.