Hi , the 1000 is great for 2x2, the 200o is recommended for 2x4 and the sf 4000 for 5x5... so i would go with 2 times the SF-2000...... in my opinion its better to have 2lights you are more floexible then.....https://www.ebay.de/itm/233373782657
Less Light for such a big tent may be not enough for flower. for vegetation one light should be enough butafter that You need another Sf-200 to get good results