Planted tank lighting duration and K values.

[Hippie9mm]

K rating and watts plus duration of lighting. (using DIY CO2 with Red Sea Turbo CO2 Bio System-use their containers and pump w/venturi but w/DIY yeast fermentation instead of their refills).

I have a CF light fixture with 4x65W bulbs (21-22") straight pin. I am currently running two 10K and two 6700K bulbs,
is this a good combination?

Which bulb should be first to light and what would be the best duration time?

Would I be better off running 4 6700K bulbs with one set on for 11 hrs and the other set on for 7 hrs?

[freshfish]

IMO the difference between the two spectrums really boils down to aesthetics more than anything else. Supposedly the 6700k produce the "best" light for photosynthesis, but in reality I don't think hobbyists will really see any difference between the two. 9235k bulbs also are rated pretty high.

So my is run whichever ones you like the looks of best.

Personally, I'd probably run a combo at all times.

[Crazygar]

I prefer running 6700K and 10000K Bulbs together as well. We can't find the GE9325's here in Canada, so this really removes that option.

Gary

[montanahh]

I'm a 6700/10,000K combo man myself. The T-5 plant grow bulbs from Aqua Medic are very nice! They don't give a kelvin rating, but a breakdown of nanometers for the bulb, which is more accurate anyway plus a CRI index of 98. I also use the "siesta" method for algae control. Lights on for 5 hours, then off for two, then back on for 5 with a timer on all my planted tanks.