I have 2 new 96w PC Dual Actinic bulbs and the blue part is bright but the purple part is not bright at all, you can hardly even tell it is purple really.
Is this due th the spectrum and is correct, or are they bad bulbs?
That's correct. It's just the way it is. The actinic side (purple) is not nearly as bright as the blue side. I think blue bulb puts out a lot more visible light.
Yep... the blue will put off some blue to balance out your daylight bulbs. The purple is the true actinic... it makes your flourescents pop. While you might think the the 420nm isn't on... it is.
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