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I use Philips Hue and am very pleased with it. You can schedule it to lower the lights at night and raise them in the morning. Sometimes it wakes me without the alarm.

Regarding sunlight simulation, especially for SAD:

http://meaningness.com/metablog/sad-light-lumens

http://lukeskaff.com/diy-sunlight-simulator-light-therapy-fu...

I used to have that. It was waking me up for the first couple of weeks, and then I got used to it, and slept right through.

There's already a "thing" similar to this idea, look up Dawn Simulator.