that is true. my schefflera is starting to wilt, ive had it planted in a viv for about 3 months, it was thriving when it was in my 38g flexarium for my veiled before i enclosed her in her perminate cage. about a month ago, i transfered it into a 12x12x18 exo-terra when i first got my pygmies, after some cage switching, and a mating male fore my crested geckos, the schefflera has been put in the permanate pygmy enclosure posted above. like i said, it was thriving even at the bottom in my veiled tank, i was of course running a 5.0, i have a schefflera tree thriving in my veileds large enclosure, thriving as well. 2.0 wont do it for most plants, ferns seem to work great in low lighting. but i live 45 minutes away from a large tropical plant tourrist place where i can pick up perfect 4'' varieties of scheffleras, ficus, chicken hens, ect for 2.49 a plant, so i have no problem picking up a bundle every few months.
i dont think pygmies need ALOT of foliage, but obviously next to bare is not acceptable, as long as they each have their own plant, hiding places, more coverage towards the back of the viv more so then the front, you will be fine. regardless if pygmies realy do need a source of light, you still want to give something for showing off your enclosure. thats why i am using an exo-terra compact top. i used a 2.0 which i agree is pretty bright. but i have taped off the underside only letting so much light into the front of the enclosure where too much foliage isnt present. they are comfortable and yet visable to the eye in the 2nd half of the tank.