I'm impressed by the Mars Hydro TSL-2000 so far. I've only had it for a month, but since my plants recovered from being root bound they have experienced explosive growth. All of their TS series use the same LEDs and electronics, so use whatever fills your tent.
For comparison the King X6 Dimmable 1800W COB LED Grow Light I started with runs $259 USD, and the Mars Hydro TSL-2000 is $249 USD. Both draw about 300W from the wall. Both allow you to adjust the intensity, although the TSL is more of a set-and-forget control as they are accessed through pry-out covers in the power supplies.
I would use a TS-1000 for a 2' X 2' (60cm X 60cm) area, the TSW-2000 for a 3' X 3' (90cm X 90cm) area, and the TSL-2000 for a 2' X 4' (60cm X 120cm) area while flowering.
You may also want to take a look at the Mars Hydro SP series of lights. I haven't used them, but have heard nothing but good things about them.
@SmokeSara may want to comment.