Quote Originally Posted by DreadedHermie
That's incorrect. 660nm is closer to Chlorophyll A's red absorption peak.



That's also incorrect. Check the European cannabis boards, especially the Dutch and Spanish boards. There are numerous documented side-by-sides where 1K watts of LED easily surpasses 1K watts of HID. Their only bitch is how expensive quality emitters are. Is uw Nederlandse taal goed?

Rackitman, if you don't want to hear from people who've successfully flowered cannabis under leds, who do think is going to give you any insight about 660nm? Some dork with a 14 watt China panel?



Also incorrect. The radiation emitted by HPS even includes a generous amount of non-visible IR, AKA "heat."

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I concur on all counts.
Good correction DH.
"You must spread, yadayada"

Aloha y'all
Weeze