The New York Power Authority has published some very useful Lighting energy saving strategies. They include:

• Shut off large blocks of non-essential lighting such as perimeter lights or lobbies/atriums with sufficient ambient light.
• Switch off a percentage of corridor lighting.
• Curtail lighting in unoccupied areas that would normally remain on.
• Curtail overhead lighting in occupied areas where task lighting can be used.
• Curtail overhead lighting in occupied areas where lighting layout permits curtailment without creating problems.
• Reduce the power of the lighting throughout the building by utilizing dual ballast lighting fixtures and multi-level lighting controls.
• Reduce the power of the lighting throughout the building by utilizing EMS controls.