The light in this video would have easily done a 4X4 area. The grower decided to just grow one plant but has new post with about five plants in it now. The problem with the Inda gro ones are they are they wrong spectrum. They are 5300K which is good for vegging but has too less red wavelengths for a good flower cycle. The supplimental cfl's used were only to supply extra UV light for extra trichome production but is not required. The light used in the video is a 300 watt 2700K set up.