For the second Green Knowledge Cafe on the 19th of September, Antonia Antoniou (the Green Steps intern) created energy saving calculators for your own use.
They are in Excel format (.xlsx) and they can be downloaded from the link below. The excel file contains two spreadsheets; the first one calculates the savings you would be making by reducing the number of lights in a given area or room while the second one calculates the savings you would be making if you were installing motion sensors in a specific room.
this is an example of what it looks like. Just add your own figures according to the instructions form Antonia in the comments boxes