Will my viparspectra xs1500 have enough coverage once these plants get larger? Or will I need supplemental lighting? And if I do need more, am I better off getting the larger model, or just getting another identical unit so that I have 2?
Hi mate, you only have 2 plants so yes you will have enough light for them. They can take more if you wanted to get an extra light. I had a p1000 and decided to get another p1000 for my 80x80. It's better to have too much light and have the option to dim them maximizing the amount of light you can give.
Getting the same model will give you an easier understanding of how much light your putting out and in what area. Plus it looks great.
Hope this helps 🙂