What a great fridge set-up. I have kicked around setting up a large fridge or freezer and you have motivated me. One of the great things about a fridge or freezer is that they normally make noise, so fan noise is no big deal. A freezer with a lock seems like a great stealth setup. I have 2 150 HPS that I picked up at a yard sale for $2/each and have been wanting to find a use for them.