LED lights question

[dragoneye898]

Hello, I have recently purchased a live tank off of craigslist and was wondering about the LED lights that came with it. The lights that came with the tank were the MARS AQUA 165 W LED lights, the link will be below. I had a couple of main questions about the lights, first of all the lights have adjustable knobs for the blue and white LED's and I was told the blue light is the only light that really matters for coral growth while the white light is mainly just for aesthetics. ( At the moment that blue light is at 100% and the white is at around 45% on both of the fixtures (the tank is a 72 gallon bow front) I was also told to replace the yellow white led bulb for another led bulb. Is that true ( for the bulb and for the blue/ white lights) and is my intensity of the lights right for coral growth or should I change them? Also another question I have is that the lights are currently about 14 inches away from the water and I was wondering if I should lower them or keep them there.

Thanks for the help and sorry for so many questions!

http://www.ebay.com/itm/2PCS-MarsAqu...sAAOSw5IJWglFu

 

[dragoneye898]

blue 100% white 20% on both ( my mistake)

 

[kendavjac]

Be careful, these lights are pretty strong. I have a Chinese fixture on a 18" tall tank. they ramp up/down throughout the day and only have max intensity set for about 60% blue and 20% white. They only stay at this level for 1.5 hours. Currently having no problem growing SPS with them. I would be worried about bleaching out coral at the the intensity you have them. Make sure you accumulate any coral to the lights, Start them at the bottom of the tank and move them up slowly over the course of a couple of weeks.