http://rareseeds.com/seeds/Squash-Summer/Lemon-Squash

Anyone try it?

That looks like a variety called papaya pear that was an All American selection in 2003, then faded out of most of the catalogs (Pinetree has it). The squash looked like lightbulbs, was space saving and produced well. I had good luck with it and also with the eight ball squash and its color variations.