Hi dear, thanks for your interest in our product.
1 SF2000 can suit for a 2x4 growing size. Attach with the PPFD of SF 2000, we test it in a 2x4 grow tent. Hope it can do some help.
You can use the coupon code: SFRIU to save some money.
Now SF 4/6 Inch grow kits available for USA/CA buyers. Perfect grow sytem/accessories for yor plants.
Please check the product link for more details.
4 Inch: https://www.spider-farmer.com/collections/grow-kits-system/products/4-inch-grow-kits