Open brain coral issue

Here are two photo's of my brain coral notice that the feeder tentacles are turning white I have changed my daylight bulbs over the last two months

10k white changed in the first week of May
50/50 changed last week of may
6,500k changed 2 weeks ago

My parameters are:
440 cal
0 ammonia
0 nit
less than 0.5 nitrate
Mag 1230
PH 8.0

Please let me know if this is an issue or just a growing stage?

 

here it is totally out (not white)

now when it comes totally out the feeders are 80% white

 

OMG could it be this? I have also added a flexible finger leather (other side of the tank) flow towards the brain.

 

Involved. I think its because you changed the color from 10k to 6500k.

I'm strong to the finish cause I eats me spinach. I'm ReefBruh the reefing man. Toot Toot.

 

Yeah, I don't really see a difference other than the lighting. What is it your concerned about? The 6500K is going to make it look more dull for sure.

 

Thanks guys - but I did not change the lights from 10k to 6,500k - I replaced the bulbs
4 bulb system 1 10k - 1 6,500k - 1 50/50 - 1 actinic

My bad should have said replaced.

But there has be a real change with the feelers only turning white

 

My worry is bleaching

I have had this coral for over 8 months now. always grown well and happy

 

That coral looks extremely dark actually. I think that's about as far from bleaching as you can get.

 

Taken from here :TrachyDisFAQ2

here is a bleached open brain

 

Completely normal. The feeders can even be clear.