I have a light acclimation question

[sharknado]

I have a 20 gallon long aquarium. I am currently running a 4bulb t5 setup, the fixtures I am using are 2 of the 2 bulb aquaticlife t5 fixtures.
http://www.saltwatertogo.com/aquatic...k-fixture.html
I am using ATI bulbs, I am using front to back
purple plus
blue plus
coral plus
blue plus
I just bought a LED light fixture as an upgrade, I intend on using the aquarium mounts it comes with so it would be approx 8" from the top of the aquarium, so about 8.75" from the water
the unit I bought is an ocean Revive Arctic-T247-B
https://addictiveaquaculture.com/en/...ter-light.html
The question I have is about approx what power level should i start off at, I will most like be running whites at 1/3 the power of the blue channel. I was originally think about 25 percent blue, 10 percent white to start, but that sounds kind of low, but I have some corals that I have owned for over 2 years and don't want to risk damaging them, so what would be a good option to start acclimating them, or there a method you can suggest to test my corals to see what they can handle off the bat etc?

[evilc66]

There is always far less risk starting low than starting too high and bleaching your corals. What you are suggesting for a starting point is fine. Just watch the coral's reaction to the intensity, and adjust accordingly. The slower you bring up the intensity, the more success you will have.

[Clown79]

Agree. Better safe than sorry. A lot of ppl under estimate LED and end melting their corals.

 

I started off at 30% and it does look low but it didn't harm anything. I increased it by 3% each week.

 

I went from led fixture to a more powerful led fixture so you starting at 20% from t5 to LEd should be good