Lugmos12 Posted July 18, 2017 Share Posted July 18, 2017 I saw this video by a well known reefer on YouTube (my question is below): He basically talks about the position of the sun throughout the day in relation to light intensity. Now my question is, for those of us that cannot control the intensity of the light in our tanks, should we be cutting down the time our lights are on during the day. My are on a timer for about 8-10 hours a day. I've read that corals need about 8 hours per day. any thoughts on this? Quote Link to comment
Clown79 Posted July 18, 2017 Share Posted July 18, 2017 If you can't program a replication of sunrise and sunset with ramping or the percentage of the leds used 8hrs would be enough. Quote Link to comment
seabass Posted July 18, 2017 Share Posted July 18, 2017 First of all, major props to Melev's Reef. I use information provided from there all of the time. Plus, his reef tanks are something to envy (and I'd love that platform he has on his main reef tank). Love the setup! His lighting is also very impressive, and much of the information in the video is helpful. Although most of us cannot replicate certain aspects of his setup; and to be honest, don't really need to. Some of what he does is an attempt to mimic nature, but isn't required. I'm pretty sure that his drawing explaining the light cycle didn't accurately describe how the intensity actually changes. It has more to do with the angle of penetration and light spread than the closeness of the sun. Still, the intensity does change throughout the day, and he replicates that surprisingly well with MH lighting. 1 Quote Link to comment
Lugmos12 Posted July 18, 2017 Author Share Posted July 18, 2017 7 hours ago, Clown79 said: If you can't program a replication of sunrise and sunset with ramping or the percentage of the leds used 8hrs would be enough. 8 hours for the main light or does that include the actinic as well? Quote Link to comment
Clown79 Posted July 18, 2017 Share Posted July 18, 2017 What lighting do you have and what bulbs? T5: actinic and white Actinic for 1hr(or 2) Both for 8hrs Actinic 1hr(or 2) Quote Link to comment
Lugmos12 Posted July 18, 2017 Author Share Posted July 18, 2017 @Clown79 I have the Fluval EVO with stock lights Quote Link to comment
seabass Posted July 18, 2017 Share Posted July 18, 2017 1 hour ago, Clown79 said: T5: actinic and white Actinic for 1hr(or 2) Both for 8hrs Actinic 1hr(or 2) I'd do actinic for 1 hour before and after (10 hours total). If you can, do a half an hour before and after (9 hours total). 1 Quote Link to comment
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