Sylvania 13W 4-pin socket [2 CFL tubes] and Sylvania 26W 4-pin socket [3 CFL tubes] look the same === = NO . There are 2 button tabs arranged differently [see fig. red and green markings in the photo]. Simply cut the 13W key tabs to fit the bulb into the base of the 26W fixture. 13w key tabs [picture above left] cut/sanded/sawed. Can we just screw bases back together? I noticed that AMZ have 4 pin adapters to convert them to screw round CFLs.
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