I use the PC labs on a Sunday and every light, TV screen and announcement board are on in the corridors and open spaces.  Surely in this day and age we should be trying harder to save energy by switching of tvs and announcement boards outwith general uni attendance times and light switches should be made more visible with an emphasis on turning them off when they are not needed.  The money raised could even be put to charitable use, if GCU budgets are healthy enough.