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gm72
01-19-2008, 02:45 PM
As most of you know, the 40 long sand tank is going to be planted, low light, 80 watts. I am going with a dual fluorescent strip. I believe that plants have optimum photosynthesis at about 6500k, am I correct? With a dual bulb strip, should I get 2 6500k bulbs or maybe one 6500k and another of a different temperature? Opinions/advice, please?

Incredulous_Ed
01-19-2008, 07:50 PM
@ 6500k bulbs will get you a nice, warm looking green spectrum and some pretty good plant growth.

Also, I have heard that the GE 9325k bulb is the best for plant growth, but I dont like the purple hue.

smaug
01-19-2008, 08:06 PM
@ 6500k bulbs will get you a nice, warm looking green spectrum and some pretty good plant growth.

Also, I have heard that the GE 9325k bulb is the best for plant growth, but I dont like the purple hue.
can you get that in a 36" CF,Im asking for my own use sorry GM.
to answer your question gm,I like currents dual daylight which is a 6700/10000k in the same bulb.

Incredulous_Ed
01-19-2008, 08:09 PM
Which one? you can for sure get a 6500k bulb in CF. Not sure about the GE bulb

smaug
01-19-2008, 08:11 PM
the gE bulb?

gm72
01-19-2008, 09:23 PM
I ended up getting the dual spectrum light for the 5.5 gallon (the same bulbs I have on the 10 gallon planted tanks) and 2 different bulbs for the 40 long. One is strictly 6500k and the other is a nutri-grow bulb that is supposed to be optimized for plant growth. We shall see.