What spectrum bleaches coral

[hyde7278]

was checking to see if it's the blue spectrum or white spectrum that bleaches coral.
I was away of a week and had a friend take care of the tank and he mistakenly changed my light from custom to sunny setting which caused a alge bloom and bleached a coral or two.

So I wanted to know if I use just the blue spectrum for a few days to calm the alge should I turn the intensity down or keep it the same.

 

[saltyfilmfolks]

its intensity not color. white jus has more intensity and spectrum(par)

 

[hyde7278]

My plan is to cut back on the intensity until the coral starts to bounce back and then slowly increase the intensity back to where it was.