<span class="link_user">@Jackofallfarming</span>,I would lower to around 8 and raise if needed thats the good thing with led u can basically place it on the plant nit literally but u know what I mean I tthink u can see in my gorilla diary how close mine is hope this helps
<span class="link_user">@biggreens420</span>, what would you recommend there at 18 inches now the book say 15 to 18 inches for flower but ill try 15 for the week thanks