Is white light necessary in a reef?

Ok ...so on my lights I have white ,blue,blue,UV, red/green channels .

With the comments above mentioning corals using spectrum within white such as green,red does it change any of that. Being as I can provide those spectrums without white is everything the same ?

My purpose of bringing up this thread again was to see if I was missing any growth potential by not running white lights when nobody's looking at my fish.
 
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