very bright with high Par almost twice my 100W HPS. It is not a very lite weight if using a light mover be sure to figure weight, it is more than the HPS ( hood & lamp ). The growth deference is incredible from the early weeks flowers showing good into the second week.
To the best of my ability, I can only tell you. Seemed like a good deal. One Bad Apple doesn't spoil the whole bunch. But it sure stinks. When you get the bad one.
Its a great light. Its a bit outdated and Im confused on how its value could hold for so long, although I have my ideas. If you have the money to buy this, at this price, you should look into Fluence LED