Next we fill the shape. First create a new gradient fill, from white to white, make the last white have an alpha transparency
of 0%, so that the light fades from white to trasnparent.
Once created you need to fill the lights. Use the gradient tool, and the lock tool to create the perfect effect.
Next use the arrow, and delete all the lines. Then turn the light beam into a symbol using F8, I called mine F-Light