Hi Harry ,
Before you will start the landing light making , you have to fit the glass covering of the lamp to the wing.
As shown in the pic below, the sides of the hole aren't correct as the wing halves are a little bit moved about.
To fit them to the glass part you need to either add some plastic to the bottom left side and the top right side of the hole ( A sub-picture) or remove some plastic from the top left side and the bottom right side ( B sub-picture). Because it is easier to remove than add something I suggest the second way showed in the B sub-picture. Then if there is some free space ( gaps ) between the side edges of the glass and the hole sides you will add some plastic as thin side walls to imitate airfoils.