Here’s a piece on the WowWee RoboCommunity forums about adding LEDs lamps onto the head-stalk of your Rovio. One of the criticisms of the Rovio is the rather poor camera mounted in the head. The lack of lighting on the head-stalk doesn’t help. If you try and look up at something with your robo-head, and there’s inadequate lighting where you’re looking, you’re pretty much screwed. Adding these two bright-white LEDs can help (or at least I’d assume so).

WowWee Rovio Hack: Head-Mounted LED Lights