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I was at Costco (Northern California) today and saw this amazing deal. The link below is the 4-pack version for reference only. At the local warehouse it is the 2-pack version. This deal is only available at Costco Warehouse, YMMV so check your local costco warehouse to see availability and price. They also have the 2 pack LED spot light (flood light) for $ 1.99.
I installed them and the quality is comparable to the ones selling at HomeDepot or Lowes. According to my local Costco warehouse, they still have plenty of them in stock.