too much too little too hot

How do I know if my corals are getting too much light, too little light, or too much heat.
My parameters are all great, but some of my corals are just not looking so great. For instance I have a x-mas favia that looks bleached at many spots, I have it located lower in my tank.
My orange Monti is not very orange and it is located up high.
My montipora Spongodes which is also located up high is just not looking good at all, it is only green at the tips.
An acan is occasionally showing some skeleton and other times looking good. It is located medium height.
My tank has been running hot, 82-84 degrees. Yesterday I placed a fan on it which will hopefully help, but these issues started before the heat.
My light system is listed below.

I've tried taking pictures, but I just can't get a shot that is worth posting.
Maybe a hint from someone on taking pictures might be useful. How should I set my lights for pictures.

 

For corals, if they are turning white, that usually (or always?) means they are getting bleached from too much light. If they turn brown, they are not getting enough light. What kind of lighting do you have?

What are your tank parameters (calc, alk, mag, pH, salinity, nitrate)?

 

If your LEDs are dimmable, then you should turn them down some. If not then maybe a shorter light period or raising the light higher. How long you had the light?

 

yes, definitely something is up with the light but I think the temp. does need to come down a little as well which you're doing.

 

A chiller might be in order. Flow, light, temp all play a roll in keeping corals happy and sometimes the place where you like the coral is the place the coral doesn't like.

 

I think you are having some light issues. I would dial those LED's way back and then raise them weekly until you find something you are satisfied with.