I had two T8 Aqueon full spectrum daylight (8000 °K) 18", and I've changed them to two T8 Floramax 18", I don't know how many °K they are, only that they are 5 bucks more expensive but they looks darker than the T8 Full spectrum. do anyone have experience with these bulbs?.
It'll be fine... Human eyes don't percieve photosynthetic light as brightly as green and yellow... I'll skip the science and just tell you not to worry :)
Thanks Redchigh! I guess its matter of the "temperature" of the light and not the brightness, just I would like to mix the 8000°K and the Floramax bulbs, I mean to use the four bulbs. BTW, I had gravel as unique layer, but since about three weeks ago I've reduced the layer of gravel to the half and added some laterite and one layer of sand (1")