To be honest I'm not sure about the red roots thing still, but there is some merit to it from what everyone else here has said. I have also found out that the roots being reddish has something to do with the colour of the blooms. Mind you, I haven't been in the orchid obsession thing long so I haven't seen a lot. Your roots aren't red, but it's a trial and error thing with these little guys, orchids are temperamental and unpredictable. Just up the light slowly over the next few months, allowing the plants to adjust in 2 or 3 week intervals. Keep an eye out for burning, some plants get really darkish red or, I've been told, really pale green. OT has a boat load of orchid veterans so help is just a click away.