At sunset, tell your Belkin WeMo Switch to turn on. I have mine connected to a relatively dim lamp. (I also use this recipe to turn off the lamp if it’s late and I’m still up: http://ifttt.com/recipes/48190)

This Trigger fires within 15 minutes of the sunset in your location.

This Action will turn a WeMo Switch on. If the WeMo Switch is already on, it will remain on.

Turn light on at sunset.