palmpunk,I have 4 that will be coming in. Iwas on a link from someone on this forum about light needs. I forget how to get back on it, but it seems that trachys require one of the highest amount of light when kept indoors for the winter.I am going to try 2 4foot growlux tubes for them.Lets see what other responses we get.

Direct air from a vent is not a good thing. Nothing will dry a palm out faster (other than outdoor drought conditions). This is a temperate palm 55-60 is ideal for this type of palm. I believe bright light is good enough. I kept mine last winter in a north facing window. It got a couple of hours of direct weak mrning light and the rest of the day bright indirect light. It did very well. It's now in the ground outside. Good luck.

Thank you both for the feedback. I hope the air vent was the problem, as I have closed it, so the problem should stop. If it doesn't, I'll be forced to put them out in the garage, where much cooler and darker conditions should cause them to go dormant, and thus stop the fronds from browning.

Thanks again