Im one month into my af grow and have 2 lights a 8 bulb and a 6 bulb.the six bulb is on the side and 8 above.Right now im using all blue bulbs for veg and will be switching to red for flowering.my question is should I only use blue for veg n red for flowering or should I use a mix.some say only red during flowering and some say to use a mix of red n blue??