IDK...but you'll need about 8 min. for that size..take there flower recommend height and take 1' off the coverage..that's about actual..so a 4' light that is square shaped covers 5'..that's about 6 lights at that size grow space...
Gavita 1700e has 100 MORE umol vs 1000w Hortilux.
IMHO the Gavta produced just as dense of a bud vs 1000w Hortilux. Hortilux has 1600umol vs 1700umol for the Gavita.