Quote Originally Posted by irydyum
Did the LED fairy tell you that too? Cmon now, who said that using hps and mh will REDUCE yield? Most commercial growers mix both spectrums to get the best of both worlds, not because they want to slow plants down.

I'm sorry i'm challenging here, but I ask you to use your brain before posting what someone told you.

I suppose somewhere along the line that if you had way too much of one specific wavelength that it may do something to the plant, but does anyone out here actually have first hand knowledge about this. Not just that someone said it, but someone that has experienced it.
as a matter of fact i read it in edd rosenthal's books and in mel franks book and ive tested it for my self! and i trust what edd and mel say because they a cannabis gewrus. when i tested it i got less yeild on the side that hade both mh and hps. then the side that just hade hps. and the same happen to 2 of my friends. so i did use my brain befor i posted and no one told me i read it and did it. and if you realy think aboput it its very posable to have too much on one spec or wave length and shut down a plant.