wukongxiang
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This has been my first year growing inside. Two 2X2X4 tents. One I have a cheap Amazon sold light that has the option for blue and red or both. I leave both on, plants didn't like just red and the blue didn't really make them happy either. With both the blue for veg and the red for flower both turned on, it's like a pinkish color inside the tent. The other tent I have a VIVOSUN light that has the Samsung LM301H. I bought this light for $119. For the dude that responded just before me here, the LM301H LED Boards are NOT EXPENSIVE and they are a little different from the LM301B, it's slight, but they ARE DIFFERENT! For one, the LM301H is the brightest LED option on the market as of this moment I am writing this. So you can go and say they B's are the same as the H's is FAKE NEWS DUDE! Anyway, I have noticed the plants using the LM301H grow faster! They claim you can get up to 40% more yield in mass of plants, so yeah, I'll keep up with technology and use the LM301H, even though they are close to the LM301B, STILL NOT THE SAME!
I will admit that you were right that there is a slight difference between the two LEDs but the difference isn't the brightness of them, its the chromaticity areas that each LED can be in. The LM301B has a wide range of bins that each spectrum intensity can fall in including MacAdam 3 step ellipse bin where the LM301H mostly uses the MacAdam 5 step ellipse. The MacAdam ellipse region on a chromaticity diagram can change the coloration of each LED slightly. The difference between the LED coloration in the MacAdam ellipse is not extremely crucial within growing. This is why the Samsung Rep can say that there is no difference between the 2 in the aspect of horticulture.