No because the UFO light uses CREE L.E.D.'s which are very bright and have a strong penetration. L.E.D.'s aren't meant to overrule the HPS light but in fact be a cheaper alternative. LED's give off virtually no heat which means no crazy fans and use up almost no power. On the other hand, you will see your electricity bill jump once your using your HPS. Its just more efficent.
The HPS delivers heavier nugs, no doubt. But the (good) LED's are right behind it, the technology is there, just give it some time and im sure they will be neck and neck with the HPS systems.
My buddys grow room has 2 1000w HPS lights and about 4 LED panels. 2 on each side. Good supplimerntal light witht he perfect mix of red and blue spectrum. If he were to use more HPS for supplemental lighting, he would have one hell of a hott grow room, not to mention a steeping electricity bill...
The arguments are endless, just search "LED grow" in the search and you will find what you want to see.
-VB