If you havent already purchased the light , id look into some different LEDs or CMH . I have vivosuns 600w it’s basically the same as the vipar pullin 270w at the wall, which is a solid light that can definitely take you from start to finish. I have a buddy who grows Autos in DWC under 2 of these vipar lights and gets good results . With that being said the light spectrum produced from these wont be nearly as efficient as say Quantum Boards or even another white light LED . The amount of power you will use with vipars will be much higher with lesser results than HID or white light LED .
basically the vipar is a solid middle-of-the-pack light but for the price point you could certainly do better
Honestly one plant is probably ideal for this light since it only flowers MAYBE 2.5x2.5 if that , this is my current grow about a month into flower so it can definitely work for personal use .
I dont use any nutrients for the first few weeks but if youre gonna feed your seedlings i would just use the big bloom . I follow this chart but i always start at about half-75% of the recommended dose for the first feeding or two especially in their early life.
Once in flower - all per gallon of water
3 tsp big bloom
2 tsp grow big (optional after stretch occurs)
2 tsp tiger bloom
1/4 tsp open sesame (first 2 weeks)
1/4 tsp of beastie bloom (weeks 3-4)
1/4 tsp of cha ching until I decide to flush in the last 2 weeks before harvest
If its a longer strain you can continue the same schedule