Hi,
For me the question is will this be a fun session?
When I first got my gong 7m I went out in light wind several times. I found that sitting there holding up a big heavy kite during the lulls wasn't very fun, and trying to fly back on my weak side was brutal hard work.
So now I'm only into light wind if the kite is big and ultralight weight. The f-one 6m is light and feels nimble, and yet I will only pump up if there are gusts above 15.