so 14hrs shouldnt contribute to a smidgen more of cyano and brown
algaes as opposed to 12? i figure if cyano shows up, reducing to 12
would be a wise decision, and indicating that 14 hrs may be a bit too
much.

if someone used 18hrs a day it would have to be a perfect tank, where
most of us here see a bit of algae now and then, and this 18hrs would
fuel up a storm i would think.