I wanted to be able to control a light above our bed without having to get out of bed. The Philips Hue Wirealess Dimming Kit ($(removed) on Amazon) was an easy way to do it. The kit comes with an LED bulb that connects wirelessly to the dimmer. The dimmer is mounted to the wall, but you can remove it from its magnetic housing if you want to control your light from another part of the room.
The remote is much easier to use than a smartphone app (and more secure, too, I imagine). I've learned that the remote can be used to control up to 10 light bulbs.