I would like to find our from our AQ bro here which is the recommended brand LED light for planted tank (say 4ft tank). What is the brand most of our AQ Bro use? I couldn't find any polling of LED light here.

I understand there is something like LED light stand and then ask someone to fix the lights on. Is it true. Where can I obtain such reliable services? Any warranty?

I am too noob about LED light about light specification. I think would probably buy ready-made one.