- it would beep every ten minutes like a miscall on a cell phone when it is on
- continuous humming or ticking when on
- motion detectors that automatically turn off and turn on lights in the room when you leave/ enter
- cycles of blinking lights every couple of minutes
- automatic turn off every ten minutes
- windows with self adjusting opacity - light and temperature sensitive
- open and close door detecting devices that control on and off switch - when ever door is closed lights turn off
