I've seen this type of setup used successfully on more than one occasion - of course, as with any cooling method, a (reliable) thermostat with the right range is required. I have yet to see a thermoelectric wine/beer cooler used successfully long-term as a grow chamber - I'd be happy to learn from someone who managed to overcome the obstacles thoughSo you think getting something like a deep freeze and replacing the top with glass would be a better choice?