wills 165watt led light?

[ugagrogan]

I would like to know how high to put it and what intensity to set it at

 

[Ron Reefman]

welcome to R2R.

Maybe a bit more info? What make fixture? Size of your tank? do you have corals? If so, what kind?

Hang it high enough so the light footprint covers the bottom of the tank. Start the lights at something like 30% white and 50% blue and then bump it up every week or two. Faster bump ups at first and slower or smaller later on.

 

[redfishbluefish]

The very general rule of thumb is to mount 13 - 14 inches above the waterline. That said, also agree with @Ron Reefman that is also depends on tank and fixture sizes and lenses on the beads.

 

[MohrReefs]

welcome to R2R.

Maybe a bit more info? What make fixture? Size of your tank? do you have corals? If so, what kind?

Hang it high enough so the light footprint covers the bottom of the tank. Start the lights at something like 30% white and 50% blue and then bump it up every week or two. Faster bump ups at first and slower or smaller later on.

What % do you stop at? I have a Redsea Led90 and its about 8-12" above the water due to how tall the arm is. I have it at I think 70% blue and like 30% white with an LPS dominate system. Is it safe to crank up to 100% blues slowly?

 

[Ron Reefman]

What % do you stop at? I have a Redsea Led90 and its about 8-12" above the water due to how tall the arm is. I have it at I think 70% blue and like 30% white with an LPS dominate system. Is it safe to crank up to 100% blues slowly?

Impossible for me to tell you that's OK. You need to get your hands on a PAR meter, or find somebody with a very similar set up.

The differences in fixtures, water depth, coral placement in the tank, water clarity and more, all play into what intensity you can run. Height of the fixture off the water is only a VERY small effect on PAR values. Light travels through air well. The spread of the light (the size of the footprint in the tank) due to height does have some effect. But going from say 12" off the water to 18" off the water over a 24" deep tank, is only going to reduce PAR by about 10% to 15% IMHO.

 

[Uncle99]

I would like to know how high to put it and what intensity to set it at

Easiest is use the PAR meter.

Otherwise, Chinese Blackbox Squares with individual lenses 14-20” above water line. They all push a lot of Par, so go easy at 40% blue and 20% white for a month.

Then “read” your corals, is everyone out and full and happy, if so increase both by 5% for two weeks, watch your corals.

You continue to move upwards slowly, corals are amazing in adapting to different light as long as you move SLOW.

Once happy, leave that setting forever.

 

[Cbones1979]

I would like to know how high to put it and what intensity to set it at

I have a 45 gallon that is higher then most tanks above. Because of that i hang mine 6 inches from top of tank. Corals are so deep in the water that the light diffusion drops quick as apposed to hanging it 12 inches higher.

Best way to figure it out is rent a par meter or borrow one from a fellow reefer. Chart the tank on paper and then assume any changes you make will increase/decrease par.

You're corals will let you know most times.