I've been corresponding with someone trying to fit a 2x4 tent.
The T1-2100 costs a bit more than the w90s, but also emits more light.
The T2-2100 would be a better deal than any of the single emitter lamps but wouldn't quite have the spread for a 4ft. space.
I tried to find stats on the Closet Case but could not. They also have a 100w lamp called Mothers little helper for the same price listed at 9,000-10,000 lumens. The w90 is probably hitting 11,000 lumens. The T1-2100 is putting out over 12,000 lumens.
Either the Tasty or A51 option would be a better deal. The Tasty would be $10 more each plus shipping, but similar value for the extra output. The T2-2100 would be under $400 with shipping... not the perfect footprint but yield would be similar and in all these cases we're examining, the PPFD would be under 500, so plenty of room to upgrade in the future which might make the T2-2100 more appealing.
I tried to talk them into a T3-2100 since it would be more ideal for a 2x4.
although, going with the T2 and adding another one later would ultimately provide the superior PPFD.