I was checking the electric supply to the tort house this evening,I turned the switch to the 7.5 watt light on (i can see this light from the back door and can tell if the power is on to the tort house without going outside) I then went into the garage to turn the circuit breaker on,and in the couple minutes I was gone, the Mt Torts saw the light and headed inside for the night,this is the first time they have used their house since April when I turned the power off to it. Just more proof of the intelligence of tortoises and that they are not just an animal of habit. ---Anyone else noticed behavior similar to this with their tortoises ?