Bests & Worsts Reviews from Amazon

The product description states "blue light of 445nm / red light of 660nm." This is a false claim. The peak output in red is at 628nm, not 660nm. The spectral peak in blue is as claimed; I measured it at 441nm. What's worse is that the intensity of red output is 45% lower than that of blue. Photosynthesis is most efficient in the red part of the spectrum, which is also important for many other plant functions, other than photosynthesis. With this high of a ratio between blue and red, plants will grow slowly and be very compact. Normally in a grow light, one would expect the amount of red light to exceed that of blue. Because this product uses 5 red LEDs to every one blue and still has a red to blue ratio this low, the red LEDs must be VERY inefficient. I've added a spectrograph of this product taken with a Sekonic C-7000 spectrometer.