Well I guess i'll be submitting some thing else. Heat rocks aren't too much of a danger until you realize if thats the only primary heat source it will become a danger. A lot of the time Heat rocks get VERY hot and if its your only heat source your gecko will not leave the rock. Over time that can cause deadly burns which can lead to bleeding and death. Its very painful to your gecko but they may not even realize. After a while they normally get dehydrated and begin to move less. I personally just prefer to use Lights with dimmers so i can control the heat and brightness.