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time of light

1K views 3 replies 4 participants last post by  dschmeh 
#1 ·
how long is to long or is it even possible to have your lights on to long? is 14 hours to long? and does it have an effect on algae?
 
#3 ·
Yes, too long a photoperiod will definitely have an effect on algae! If you have stem plants, you can see them 'closing up' after a certain amount of time. I see this in my Rotalas, and aromaticas after 9 hours. My photoperiod is 10hrs.
 
#4 ·
agree with above you want intensity longer duration wont make up for this.
mine are on 2p-11p
 
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