photoperiod?...

Can't say it is bad but its a little long IMO. If it were main lighting, I would say its far too long to have on but just actinics probably isn't hurting anything. Are these just actinics or a higher PAR ATI Blue+ type bulb?
 
Nope, shouldnt harm anything with actinics on that long. I personally try to keep my MH run time around 5 hours, but it depends on the system.
 
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