I been at drip / dwc combos for a cpl. years n let em drip 24/7 .
I veg w/ 20/4 btw . I believe the bulbs n ballasts last longer when given a break . I have used 24/0 , 18/6 , 20/4 over the years and saw no great dif. in growth myself .
Peace
Crispi :jointsmile: