Jeff.:P:.

Hello,
I'm currently running 2-65watt 6,700k. I'd love to get some more color out of my reds/purples. I'm gonna buy a 9325k. If had both running 9325k is that excessive? Also has anyone ran just 2-9325k for a long period to see any changes in plant growth rates? or affects in algae growth? Should pair it up with something else? Thanks in advance.

MatPat

For the past several years, I have ran two 55w 9325K power compacts and three 32w T-8 GE Fresh and Saltwater tubes (supposedly 9325K) on my 75g. When I could no longer find the GE T-8 bulbs I switched over to Zoo Med's Flora Sun tubes (Supposedly 8500K). I've experimented with various K bulbs in my T-8 fixture and always go back to something in the 8000k - 9325K range. I don't like the way the lower K bulbs seem to wash out the colors in my tank

I've never been able to attribute plant or algae growth to a change in bulb color. An increase in bulb intensity maybe (more intense light output of a new bulb) but not K color. All of my algae or plant growth issues always point towards something I have done...missing or changing fertilizer dosage, increase or decrease in CO2 levels etc. I've never been able to pin anything on a change in lighting color temps

Jeff.:P:.

Thanks Matt. Would you recommend a combo of 8000/9325 or (2) 9325's.

MatPat

I'm assuming you are running one fixture with two PC bulbs that are side by side and not front to back? If so I would use the same bulb on each side of the fixture.

The color combination you use is totally up to you and your eyesight. The pictures in this thread, especially Gomer's, give a good representation of what the difference in light does for the plants. I prefer the look the "pinkish" bulbs give my tank but some don't like it at all. If you don't like the look of the 9325K tubes, there are plenty of people on here who will buy them from you or maybe trade you for another K temp lamp

Jeff.:P:.

It's one of these guys. So It's the side by side? If so I'll go ahead with 2-9325k's. Thanks for your help Mat.

MatPat

I think I'd call that a front to back arrangement on the lights I would call a 48" 2x65w fixture a side by side.

Jeff.:P:.

aha .
um, so you'd do something different than 2-9325k with this set-up. sorry if a PIA.

MatPat

Ha ha, I would run dual 9325K lamps personally You can always mix one of your 6700K lamps with one of the 9325K lamps and see how you like it. The bulbs are easy enough to change

Jeff.:P:.

Thanks again.

kakkoii

can you take a pic. of just that bulb when it is turned on?