09-04-2013, 08:28 PM
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I heard the 3100k bulbs were yellow when I read reviews online that people wrote and I heard people didn't like them... Im not sure I wish they had a spectral graph of them on the boxes..
Just remember is isn't the K that really does anything.. Its the spectral light it puts out.. I have seen 6500k bulbs that don't have many reds in them, mostly just blue and green and a few red on the 600nm scale..
You want reds in the 600-700 range. 650 is best.. That's why pink bulbs are the better bulb to get vs a 6500k light.. Pink bulbs are usually 5,000-5500.. Or like the colormax which have no rating but are supposedly really high like 15,000k.. Colormax bulbs from aqueon are actually surprisingly really good for plants if you look at the spectral graphs