Sorry, have no idea about growing under lights because my collection of orchids is "outside" all year....in glasshouses, or a shade-house or a few at various places as Garden plants. The problem i have is not heating enclosures to that mythical temp of about 55F (12C) minimum at night during winter. There are some "Vandas" that do not need all that much warmth and that might be better for your culture. Look for hybrids that have Vanda coerulea influence (many are blue) Or Rhynchostylis coelestis such as Rhynchocentrum Lilac Blossom where the flowers are coloured as per name and are not blue. Avoid the types with terete leaves as they are high light orchids. Hopefully, some of the under lights growers will add to this and recommend some good orchid nurseries in the USA. The thing about the red cats is that yes, some of the hybrids with a strong Sophronitis influence do like it a little bit cooler but there should be some over there that will grow well in general Cattleya conditions.

Plantivorus, which grower did you buy it from (what is their real business name, not the one on e-bay). Just a thought for the future, when my Vanda roots grow too long, I soak them in luke warm water for a while so the roots are nice & pliable & tie them into loose balls. Also you said that all the roots are very dry and do not turn green anymore, you are using tap water, do you have a water softener on the water source you are using? Even if it is an outside water valve, they are sometimes tied into the house water with water softener included. If you are interested in getting roots growing quickly (well at least as quickly as orchids like to do things) you can buy K-L-N liquid rooting hormone & soak the plant in the solution for 3 minutes. Since this is a Vanda & they like to have everything in excess, I would make the batch with an extra measure of the rooting hormone. I have used it with great success on all my plants (including vandaceous types). Do not be concerned with messing up the plants hormones, it will not bloom until it is able to get water and nutrients into its system. If you are concerned with the hormone affecting you, then just wear gloves for a day or two while handling the plant so that the residue has time to be washed away & evaporate. Good luck!!! -Ray-

So pretty

google. where in the house does it live? It must be living in dry air. And that is why it is unhappy. You need to create an environment it likes or give it to someone that has the right environment. I live in South Florida and I don't grow orchids from the Himalayas and they can't grow orchids from the Everglades. With an effort you can make an artificial environment to survive or thrive depending on how well you do. I can't tell you how to build one. I never needed to. Because I don't have mountain top orchid either, living in low flat lands of Florida. I have been given orchids in the past that I had no chance in creating a culture that would work. I gave them to a grower thad had success and proper culture.