I have the NS brother. They are a beast of a led. Designed for commercial use and IP66 rated, so completely sealed. So far I am loving the coverage increase and lack of noise. The heat is not near as bad as I thought. The light bar design dissipates the heat quickly, especially with a few fans going. The NS will cover a 4 x 4 by itself and the DS will do a 5 x 5 easily. I would buy one when they run their 50% off sales, as I got mine for just under half off. Sign up for their newsletter and you will receive notification of the sales. I suspect they will run another during Christmas. Honestly this is the future of led development in my eyes

However, they are big and very heavy and being that the drivers are offset mounted on top, you lose about 3-4 inches of height in your tent. But that being the only downside, it gets a thumbs up from me so far