Falcon Eyes RX-18 (II) SB+HC is designed to be used with Falcon Eyes ROLLFLEX RX-18TDX (II),
it comes with softbox, diffusor, and grid as a light modifier of your flex light.
Why do we need honeycomb grid?
Open softbox usually gives you a wide angle of soft light, with very broad and smooth edges,
it will be very difficult to divide the background into two parts with different brightness.
The situation changes radically if we put honeycomb grid over the softbox,
it then give you a decent amount of soft light with the sharper edges,
and now the model/object is divided into lit and unlit parts.