Tie office overhead lights to your CAC card, similar to many hotels with their room keys. This way the lights would be on only when needed. Built in (DO NOT RETROFIT - TOO COSTLY) into new buildings programable light pads i.e. lights come on 0700 off 1700, after those hours you need to program time in 1 hr blocks manually for those who leave after hours. At least lights would not be on 24 hrs a day.
Idea No. 5678