Hi, just joined the forum. I have these lights too, have had for a while now. Wishing I had this much info when I bought them.
Currently running them at 50% in my Rio 180 at 2 photo periods, 4 hrs each, however they won't turn themselves for the second period and I need to open the options in the controller and then exit, at which point the come on. Weird.
Anyway, looking around for a co2 set as I really want some red plants.
Question on lighting is, will longer low light periods, say 10% for extended hours, 7-2, then full light until 10, then low to 11:30, cause an issue. Is even that little light eviugh to cause algae? Reason being I would like to see me fish before and after work and have very long days most if the time and the light controller doesn't seem to like running dual periods.
All help welcome.