One of the newest trends in growing is a Vertical grow, using stacked bare light bulbs there is no need for a reflector, in fact with reflective material lining your room the room itself becomes the reflector.
A few design considerations 50 watts per square foot, a fan capable of moving twice the volume of the room every minute.
Surrounding the lights with plants will give unreal growth and yield. Rehab your own medicinal marijuana grow with a vertical setup and you will never look back.