mars ts 1000

Hi All, In a 4x4, I am using a MarsHydro TS1000 in between 2 Viparspectra450s only running white light for seedlings... Any advice on time/height/power for seedlings? Currently running all 3 lights @ height: 22inches, power: 30% time: 18/6, medium: coco Thanks in advance for any commentary!

No way to look at trics so just curious as to how much longer you great folks think. 2 separate bagseed grows flipped at the same time.