Take a screen shot with the lights on so we can see whats happening. On the bulb you will need to add a glow to it so we can see where the lights coming from and if your bulb has a solid colour on it you wont see the light through it as it will just light the inside so position your light just above it.
a quick 2 min demo on how i would do a light bulb (obviously more tweaking and detail would be involved.)
I would also model the inside of the room as it looks like your looking down into it which wouldnt be the case from the angle your at. And i would add a wood bump to your shutters as most likley this is what they would be made of and then painted.
Hope that Helps.