The 420's seem to give off a more purple light similar to a black light almost, while the 460's give off more of a french blue, they're lighter to my eye.
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58 gallon rectangle with 65 pounds of LS and 65 pounds of LR, Aqua C Remora PS, CPR refugium, tunze nanostream PH, and 4 x 96W PC -- 2 10,000k, 2 actinic |