I ordered two of the 8 ohm 100 watt ones. Do you happen to know their dimensions? I am building an eyepiece case to hold my telescope's eyepieces and am going to use one of these to warm the case to keep dew from forming on the eyepieces. I need to know its dimension, to allow room for it in the case. I expect them to arrive this evening, so it is not a crushing concern. I would just like to get a head-start.