dude those things are big and bulky and a lot of them are multi vapor not halide and they are usually yellow 5000k or 6500k. I start up about 30 1000w every morning and they are loud. I think they would work for a fuge but they take up so much room even the 175's are bulky, if they had a remote ballast I don't think they would be that bad...
I think they could be used. Most of those also take medium based bulb's wich have a smaller base than regular mogul's. I don't know of any companies that make a 10k med base....