I was under the impression that 24 hrs of light was no good for autos
It's not bad for autos either. I think it made my ER finish faster. Autos like to sprout, get big, and then put out the pretty stuff. Cannabis uses light when it's available, and rests when it's not. If light is constantly available, it's constantly using. (I'm talking Auto's here)
But I will confess that I will be using 20/4 for my next grow during flowering to see if it produces more resin.
Lots and lots of sweet flowers forming in there jiml!