At first I was skeptical about LED’s for growing plant. My has the technology come a long ways! I bought two of these lights and two of a competitors. Both cost about the same. The competitors LED are 4 Cobb lights. Both lights worked excellent. However, I prefer having all of the little LED bulbs spaced across the light, and I will tell you why. This light runs really cool on the plant side. As you can see in my picture of Mimosa (grown in biological soil, no salts), the light is about 1.5 inches from the tops of the plant. I ran it like this the entire 9 weeks. There was no burning of the colas. Those colas are drying right now, so I haven’t been able to sample them. The plants stretched to be 5 feet tall under this light. Each plant (five mimosa clones) had 4 colas like the ones in the picture. They are the biggest colas I have produced to date. I am now in the process of purchasing more of these as the money comes. One additional note, there was one HID light in the room that was red spectrum. It was at 850 watts, just to make sure that any plant material not directly under LED would still get light on it. But these colas were taller than the HID light, so they didn’t get HID spectrum.
This light is very directional, with good canopy penetration. If plant matter isn’t under the LED, it won’t get much growth. Manage your canopy accordingly.