[Spell] Lighting Cone

[WeaselChiseal]

Hello, i'm having a problem with creating some spell i had in mind and i hoped you guys could help. The idea is that a hero casts a lighting at every unit in a cone in front of him. So i pick proper units, create a lighting effect betwen casting unit and picked units but problem is..., how do i get ride of this lighting effects afterwards? As far as i know there is no variable for "lighting group" or something like that. Sorry, i never bothered to use "lighting" before so i don't really now how to work around it : /. Have you encountered similar problem with lighting before? I would be gratefull if you shared some tricks or tips with me.