There I can't help you, I'm no tech, just reporting my opinion and limited experience.

I've heard the 3w LED's are better than 1w, and anything less than 1w is junk no matter how many they pack in there. Something to do with the spread of the light emission too. But again, I'm not a tech and this is pretty much just hearsay.

As far as the spectrum, not certain here (not a tech guru), but they only emit one wavelength of light per LED, so it's not really a ??whatever??k light. It's 660 nanometer or 430nm or whatever, per any given LED.

The one I have has 3 bandwidths of light,(red, red/orange, and blue) and to the human eye seems purple. Plants look black under it. Any problems seem to magnify, a slightly yellowed leaf under HID looks white under LED and is easy to spot. Again tho, this is just my experience after the first 2 weeks under LED for veg.


Perhaps Kitsune can help enlighten as to more detail there. The exact science would be interesting to know.