Thinking about new lights

[timwag2001]

what type of bulb is the 3 month old one? any idea? k rating?

 

[timwag2001]

change out the old bulb for sure and then the newer one when you get a chance. flip the fixture over and look at the bulb. you said one has a yellow color to it. are they both the same color?

 

[67chevelle]

What if I did one 10000 k bulb and one of the bulbs I have now?

You could do one 10000k and one 6500 or 6700k.

 

[Paintballer99]

Ok. First I'm going to try two 6500k bulbs, then maybe try that.

 

[kj5kb]

What problems?

RE 10000K vs 6500K..

IMHO 10000K is a bit blue and can tend toward unwanted algae growth.
I'd use 6500 for a planted Freshwater tank...and daylight tubes are fairly cheap.

I do have a few LifeGlo2 tubes in use that I bought cheap...75%off. The rest are mostly Phillips Alto Daylight (F32T8DX or F40T12DX) tubes from Home Depot. They work great.