you can bring them indoors but you may bring in pest or bugs with it but if you have no other plants growing indoors dont really see it being a problem.
dont use a uv light to grow, high intensity discharge lights like metal halide and high pressure soduim is what is generally used, flourecents can be used also but do not work very well for flowering.
it probably is just stress from being repotted and moved your plant will probably start looking normal in about a week.
why are you moving it inside at night to begin with?