CBD Industrial Plant

I started low feeding of 1ml of Advanced Nutrients Sensi Bloom A,B + Voodo Juice per liter of tap, dechlorinated water. Watering about 100ml per day. Wondering is it enough at this stage of growth. Starting to regret that I didn't make more of search before buying a lamp. The lamp should have about 500 PAR at 18" height, but I am afraid it is gonna be not enough during flowering. #1 is growing a little faster than the others, but the difference isn't huge. Nice green leaves color, they seem to grow very healthy. No deficiences or weird spots on the leaves. #3 is still 1 day behind the others. Until now no problems with the ladies. Hoping it will stay like that :) Regards!