4x4x8 is a pretty big tent for any one single light, depending on how big your light is. If you plan on spreading your plants out from one side to the other, which I assume you do with a tent that size then the average LED in that price range isn’t big enough to create an effective footprint.
What does the product specs list as the physical measurements of the light?
For a 4x4 tent, you should get a pair of Horticulture Lighting Group 260W QB V2 kits. They are on sale right now for $330. This is the company that makes all the good stuff that all those Chinese importers are copying.