New to Tetras but not new to the hobby, recently added eight BA Tetras to a 55g with an existing eight Tiger Barbs. They have been together for about a month and to my surprise, it has been an incredible bond between the two species, always together and they school together as well. My issue is with the lighting, the Tetras don't seem to like lighting as the Barbs don't mind any type of lighting. I went from two fluorescent tubes to one and the tetras still hide, I actually have to block about 50% of the one tube to get them to come out. Is this typical for these fish?