I'm running a Chilled X3 on my Veg side, and am more than happy with how it has performed. It would fit a 2x4 tent rather well. A little on the pricey side, but my veg plants outperformed my friends who's running an HLG and Mars light in his 2 veg tents. The LED game is way more flooded with lights than the old MH and HPS game, those were all down to different bulbs. Shop around, find what will fit your budget, check the "Best Deals" thread, as some nice lights have popped up that are inexpensive for starting out.