I called several of our local stores and they only had the smaller wattage. I had to order one through Amazon to get the 250. I put a link in an earlier post to the one I bought. I chose that brand because ALL OF THE OTHER BRANDS had bad reviews.
http://www.amazon.com/gp/product/B003HEIMGU/ref=oh_details_o01_s00_i00
http://www.amazon.com/gp/product/B003HEIMGU/ref=oh_details_o01_s00_i00
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