Ive got a 6 bulb t5 and I have
(in no order....)
2x super blue
1x true acitinic
1x 10K
1x 14K
1x fiji pink/purple
this works great and things look good.... most of the color spectrum is hit in some capacity....
I'll change out the 10k and the 14k once a year and nothing looks bad - I grow almost everything even with old lights.... it might grow faster if I was changing them all the time but.... really..... I dont notice much diff from new to old 10k/14k lights...
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