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whaase
01-14-2004, 01:12 AM
I was at Quickgrow today picking up some part for my lighting and the guy was showing me a new bulb they got in. It was a 125w PC, and it was 25000k It looked like a actinic bulb. It was $100... Would something like that have the same properties as a actinic or is it something different all together?

Walter
rossb
01-14-2004, 01:47 AM
I have both the 125 W 25K and the 6.4K in my tank, I like the combination. They are also available in 50 W. I also have actinic bulbs and to my eyes there is very little difference.
whaase
01-14-2004, 01:55 AM
Do you have any pictures of your tank with that combo?

Walter
Bob I
01-14-2004, 03:04 AM
Sorry to bug you guys, but does anyone have a definition for actinic versus just blue. Or is this just more of a myth :question: 25000K should in reality be quite blue. :biggrin:

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.
whaase
01-14-2004, 03:11 AM
It was very blue! They have one running in the window. You can see it from outside. It looked just like a actinic, that's why I was wondering what the difference would be? Any actinic bulb I've seen was rated by the color wave? (420?) but I have never seen the color temp (K) on one. Or, is there even a relationship between the two?

Walter
Bob I
01-14-2004, 03:30 AM
Well Walter IMHO blue is blue is blue or some variation of same. I have three tubes right now that are supposed to be actinic. All have a different color. What really is actinic I want to know :question: :question:
StirCrazy
01-14-2004, 03:32 AM
Sorry to bug you guys, but does anyone have a definition for actinic versus just blue. Or is this just more of a myth :question: 25000K should in reality be quite blue. :biggrin:

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