What tenbear said.
AND... as I mentioned just a bit ago... the same seller is in the top of the OP. But I wouldn't want to burden you with actually reading the OP of a thread. How important could that be???
;)
(For anyone wondering... bigfoot and I are actually friends)
The 24 panels should be a little brighter. As far as I'm aware, Dave-Sparky has not tested those. My theory would be that they may not last quite as long as the 36s as, A. They are brighter, and B. There are fewer of them to spread the power around as the voltage changes. But this could be nothing more than a WAG.