Originally Posted by Hoppy
That 14 watt CFL bulb should be about 20 inches above the substrate to get 40 micromols of PAR, which is as much light as you need, with CO2 to grow the carpet. Any closer to the substrate and you will very likely have to fight off algae attacks.
What about a 14 watt 6500k same brand bulb?
And I'm trying to grow it with the dry start method though