advice please

is it wourth me switching to a sf2000 from 2x viparspectra tc600 3weeks in auto grow or should just wait till next season start fresh

imo, no. viparspectra tc600 is a 260 watt light. so you have 520 watt right now. sf2000 is a 200w light. so you would be losing a lot of light even with the added efficiency.

ok i just got someone telling me a sf1000 would be better than 2 vipar tc600

I would stick to the 2 viparspectra like pulpoinspace mentioned.

thank you