your model is good , but what i think you should do know is taking care of the high satruation you've in ur lights. just look at real light they are self-illuminated not highley satruated.i guess you are using maya textures to do the colours of the lights(maya textures are highley satruated) ,if so try to map them to the satruation node (i forgot the name you will find it in utlitly section of maya hypersahade section) and reduce its satruation. or use fransacaluce shader that makes any object a light. (haven't tryed it ever)


good luck.