Please there are 4 channels and each channel has it own means
1,channel 1 : strong and cool white which is like noon sun.(not same, because have to delete the no-useful spectrum such as green)
2,channel2 : moon channel.
3, channel 3: most useful channel for grow. when coral version, all are 450nm blue. when fresh water, it is 14000K white+blue+red+green..
4, channel 4: compensate to make tank looks more nice
My suggestion about your setting
1, make the channel 4 bright early such as 6:30. it is looks like morning sun.
2, set channel 2 3%-5%during all night. this make your tank not dark when night. unless your tank is in sleeping room ;-)
3, why you want to turn off at 21:00? I think it is too long time lighting.