How Long Do You Leave Your Lights On

[ridomart]

I've got 2- 250 Mh's, & 2- 10,000 VHO's on a 120 gal. How long do you leave your lights on?

 

[double]

I have 3 250 MH's and leave them on for 10 hours a day. From 11:15 to 9:15.
Don't know if that is good or bad but it seems to work well in my tank.

 

[sergeant]

I have VHO's, the blue 03 lights turn on an hour before the whites and go out an hour after. Total about 10 hours a day. The light in the sump is on 24/7.

 

[tomtoro]

I have three mh 175's. On for 8 hours with actinics on two hours before and two hours after.

 

[beth]

You can experiment to see what works best for your animals but a good rule is to start off in the morning with the VHO's for about 2 hours, then set the MHs to go on. Likewise, at night, have the MHs go off about 2 hours before the VHOs. 10 to 12 hours is pretty standard for fish tanks.

 

[gatorwpb]

Originally Posted by Tomtoro
I have three mh 175's. On for 8 hours with actinics on two hours before and two hours after.
Same but with 150wx2

 

[curtis1158]

I make it easy and set the timer 10:30-10:30. Twelve hours each. Wanted to have the lights on at night when we are home as well.

 

[ridomart]

My VHO's come on for 12 hr, & my MHU's come on 2 hrs later for 7 hrs , is this ok or have the MHU's on another 2 hrs?

 

[ridomart]

also have a lot of corals.