Don't give up! Peltata is the most forgiving of the tuberous species, and isn't that difficult. You just have to give the plants what they need. This one may grow under flourescents, but not in warm conditions constantly. If you can provide a night time drop of @ 5-10 degrees, it should do Ok. I grew mine from seed. The more light the better. Start the seeds when the summer heat is done. This is a really beautiful plant
that more people should grow and experience, and the seed germinates far easier than many other tuberous species. Remember to dry the pots off slowly for good tuber formation when the plant shows signs of dormancy. This is often the hardest part of their culture.