The scene just have one light for whole room & one on the top of the lamp. Of course it's not enough for lights up the scene.
There have many areas really dark, it'll not happen in the real world.
u should create more lights with low intensity from the right, bottom & back.
u can try to use more shaders, eg. blinn for metal of the lamp; phongE for plastic of the monitor; create a wood texture for the table.
u need to explore more in Maya to find out the interesting things in it .
