Ok, lighting is really important re nighttime wakefulness. If you have any lights on at all, keep them really low (eg a 5 watt low-energy bulb with frosted/ambient outer layer) and only use the warm white coloured bulbs (the daylight white bulbs are very blue, and that's the colour that wakes people up). Likewise, if you are going to park him in front of the Telly, turn the brightness way down and adjust the screen colour to more at the red end (low colour temperature) and turn the colour saturation down. It won't stop him from waking but it won't keep him wake so much either.