I need help with my lighting please!!!

Im trying to figure out if I should use either one-1,000 watt light or should I use two 400 hundred watt lights to grow super skunk. whats the difference in wattage as far as growing and does one method grow faster than the other one. How many plants can I get from either light or lights (as far as using two 400 watt lights at two different angles to rotate and get more light to more plants or one-1,000 watt light). Which is better I need to know the truth about this. The width of the room is 11 feet,6 inches. The length of the room is 14 feet,8 inches. From the floor to the ceiling its 7 feet with two attic slants that are 8 feet long in width and 6 feet long in length. Its a residental dwelling in a attic so I sure its running off of 110v.

Well one of the first harvest we ever did was 15 (mother's finest clone) under 2-400w hps with fox farm soils in 1gl buckets, this person got 15oz's.

(EDIT: this mother's finest was awesome tasting) Good job C.

Now another friend had a 1kw with 13 haze clone's in a Mega Garden with no A/C. LOL, seriously b/c it was like 90-95 the whole time. Either way he got like 21-22 oz's. The buds come out more dense and thats that on the 1000, FOR SURE.

Ive seen alot of 1000w harvest and the buds are just denser for some reason to me, unless you got like 600's setup right like at least 3-4.

GO 1000, You won't regret it!! It's all about Watt per Gram. Period.

The 2 400's would produce less heat when i come to think about it now. It was pretty cool in an apartment closet with hose running from room a/c vent to "cab". A 1000 was INTENSE to say the least, you need A/C.