LED there be light!

concerning sustainability: we just replaced about 320 conventional fluorescent tubes in our warehouses by highly efficient LED tubes. In our offices we have 64 ordinary ceiling lights replaced with 35 ultra-modern LED ceiling lights. In our hallways and in the foyer we have 75 Halogen lamps converted to LED lamps. Instead of 25.000W power for all lights, we are now only up to 9.000W. This corresponds to a reduction of almost 65% - that is not too bad, right?