Improving the energy efficiency of lighting systems is a no brainer, the obvious gain is lower the lighting energy consumption. But in air conditioned areas the second benefit results from the lower heat output, because means reduced bills for the air conditioning too.
Let say your air conditioning system has a COP of 3, then reducing the lighting consumption by 1 kW also means lowering the load of the air conditioning system power consumption by approx. 0.333. So together, a lighting improvement will save 1.33 kW.
Concealed uplighting, as pictured above, is the ideal candidate for lighting upgrades, replacing those tired T8/T12 lamps with energy efficient T5 lamps today!
— John Herbert, REA, Energy Consultant