I was thinking about this ...
everyone knows that light is bad for roots right?
but when i read posts by Earl with his crazy assed space shuttle system, and Stinkbud with his Aero/NFT system they both have heaps of roots all over the place.
They have photos of kilos of roots, they chop them off in masses with no damage, etc etc.
Anyone that has done DWC or Aeroponics has exposed the roots heaps of times.
Then i look at Al B Fuct and his cloning thread. You can see the roots out of the bottom of the rockwool in every photo. In fact he waits till the roots are well exposed until he plants them.
Obviously roots do have a tolerence to light. How much i dont know, but they do.
so the question is : HOW MUCH ??
Aeroponic Space Shuttle
Harvest a Pound Every Three Weeks!
A Batch of Clones in Rockwool