Home Proofing Box
I have found the answer to the perfect home proofing box. By going to www.uline.com  and searching for product no. S-9904, you should find the foam shipping kit. This is basically a styrofoam box measuring approx. 29x23x14in. deep. To the inside of the lid I've added a plastic lightbulb fixture and run the lamp cord back out through a small hole in the top. I added a plug to the end of the cord and use a common lamp dimmer switch for adjusting the light intensity. My switch is a Credenza model M03 by Lutron. I'm sure your local hardware carries several brands of dimmers. I currently have a 15 watt bulb which keeps the temp. at 78F. For humidity, I add a cup of boiling water which adds moisture and also raises the temp some. This method has served me well over the years. I keep and use it in my basement which is about 55F in the winter without any troubles. I did keep the insulated box inside the shipping box it came in, and by removing that top, you can access the foam top of your proofing box.