FourTwentyBlackbirds
Member
Not any more. White COBs have wasted green and yellow. Red is used the most efficiently.CMH has a considerably better spectrum than LEDs do, you will get much higher quality buds with a CMH compared to a LED due to the additional UV and quality of the spectrum.
chilledgrowlights have a spectrum tool on their website.
However on a budget the viparspectra PAR 1200 with separate dimmable controls for each channel RBW would cover your area. I'm using the PAR 700 it's quiet and cool running and you can just use the white only on 50% for clones or seedlings.