I'm not an expert, but I say better safe than sorry. Go buy 2 32 watt 6400ish($4) lights and get them on your plants. Buy cheap light sockets on plugins and their under $5 a pop as well. The truth is they will probably grow in red(2700,) just not as well as if you included some 6400 lights. I wouldn't take your big red one out, because lowering your wattage is never the right answer imo. just add a few little blues and switch them to red when ya start budding.