[Cindy]

Ken, I have no idea but D. paradoxa don't go dormant for me under flourescent lights. However, at my balcony it does. The reason is probably because the sun shifts away during the end of the year while during the hot months, the balcony becomes very bright. Under light there is more consistency.

I can probably tell if I have the plants side by side but it is harden to pinpoint the differences between the two forms of paradoxa. Drysdale isn't the only one which can turn all red for me, so will the typical form.