I didn't see anything on the web site for me that would indicate BOGO.
May be a regional promotion or maybe I'm not looking in the right spot.
It's hard to gauge whether it is a good deal or not compared to after season clearance since the after season clearance is so subject to inventory. 3 years ago I bought close to 400 light sets from Walmart (incandescent) at $0.50 - $0.75 a box. Most stores had way overstocked for the demand. Last couple of years, most of the shelves were cleared out even before Christmas so no good deals at all.