As Marshal McLuhan famously said “There are no passengers on spaceship earth. We are all crew.” As crew, it is our responsibility to reduce energy consumption wherever possible. One simple and effective way to do this in the hotel environment is to install a device near the exit of the room which can detect the presence of the guest’s 125 kHz HID or AWID room card. As long as a card is present, a relay is activated which enables selected lighting and outlets. As soon as the card is removed, the relay is deactivated after a short, programmable delay. Unlike devices which use a simple mechanical switch, the Active Presence Reader cannot be defeated by simply inserting a business card, mag stripe card or other such item.