These lights are made with an animated texture in order to reduce lag caused by texture switcher scripts. Because of this, they are not able to be modified so I suggest you overlap them where you need shorter length. Copyable so you only need to buy one.
These objects and textures have specific perms attached to them. If they say resell, you are free to add them to your own creations, for example, you can add a tombstone to a haunted graveyard you are selling. They are not to be sold "as is", as in exactly how I am selling them.
From Lauren's Tiling Textures in Ranunculus.
*If the textures in this box happen to be marked "Full Permissions", it means you can apply the textures to anything of your own creation and then sell it. You may not resell my textures alone, they have to be applied to an object.