To the ceiling. Lol I'm just trying to get an insight on other people timing
700w led in 3 gallon pot.right now it's only about 14in
Without knowing how high your ceiling is, it's impossible to say a height.
Work out:
-How high you can put your light
-How much distance you need between light and flower tops
That will give you a "critical point" which is the highest you can allow your plant to grow to, let's call it "n". Now work out:
-Distance from top of pot to point "n"
-Divide that number by 3.
The result is how high you can grow your plant to.