Interrupted Daytime Lighting Advice

Hello,
I want to try a 2 hour lights off period during the middle of the day
(while I'm at work basically). Are there any advantages/disadvantages of
this regarding plants or algae control? I personally don't buy any
arguement of stressing out the fish. My room isn't pitch dark or anything
(fair amounts of indirect sun) and it's not like fish in the wild freak out
everytime it gets cloudy.

Thanks in advance!