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.
Costco online 4-pack link (Warehouse is selling the 2-pack) [costco.com]