Light the following scene through camera1, with direct, Physical Sun and Sky light illuminating the desktop where the desk lamps and books sit.
The Physical Sun and Sky light alone will not provide sufficient lighting for the scene. Cheat the scene by adding lights, adjusting Global Illumination and/or Final Gather.
The books sitting at the top of the crate in the foreground also need to be lit by a source similar to the sunlight. Cheat it.
The desktop lamps should not be used to provide any lighting.