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Originally Posted by Bob_I
Sorry to bug you guys, but does anyone have a definition for actinic versus just blue. Or is this just more of a myth  25000K should in reality be quite blue. 
If you are building a new top like Ross did the bulb is not bad in price. If you want to go another route, I have 96W tubes in my fixture, and the 36" tubes are around $50.00. So whatever works best for you. |
Actinic light has a spectral peek of 430nm so any light that has a hugh spike at 430ish nm is concidered actinic if that is the majority of its light.
Steve
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