I started out with one 300W ViparSpectra reflector series LED. I had 4 successful grows with it. I "upgraded" to two 450W ViparSpectra reflector series LED. I had four more successful grows with those. I now have three 600W ViparSpectra reflector series LEDs. I'm currently on plant 8 with these and am planning an upgrade to a DIY COB project. Are they the best? No. Do they work? Yes.
I can't speak for anyone else, but I am never satisfied with something just "working fine." This is a hobby for me, not a means of income so I can get away with "good enough" for now, but with any hobby, I will be moving on to bigger and better toys.
Also, if you only google bad things about a subject, that's all you're going to find. The alternative is also true. Confirmation bias is tricky to work around.
I have friends that have used only T5's , also one that only used CFL's for the entire grow.
I think what's important is that it works for you, but most importantly your budget.
One thing I can guarantee is that nobody here will judge you whatever you decide to do and will do their best to help you no matter what.
I forgot to address the question in my enthusiasm: I keep my 600W ViparSpectra reflector series about 40" from the seedlings and they just sort of grow into where they're supposed to be. I usually have to move them around a bit in flower, though. Somewhere in the neighborhood of 12"-18". Do I grow the plants to their full potential? No. The amount I get is plenty for my wife, myself, and to share with my friends. I also don't bother with the veg/bloom switches and keep them both on the entire grow. I never noticed a veg/bloom switch on the sun, so who knows (no, they're not the sun, I'm just being stupid).
All of the plants in my Z_Bop albums were grown with ViparSpectra reflector series LED's. Feel free to look and critique if you like.
Udel sends you embraces and warm gestures
Comments and constructive criticism is always welcome!
- Z_Bop