I have tried using this code but it moves the Vector3 position of the primary part, so the lightning won't go to the right place, please help
clone.lightning_g:SetPrimaryPartCFrame(CFrame.Angles(0,180,0))
You're setting it to position 0,0,0 because CFrame.Angles() is only the rotation. You can fix this by taking the current CFrame and multiplying the angle onto that CFrame.
Also, you'll have to use math.deg(180)
seeing that CFrame.Angles uses Radians instead of Degrees.
You can use the following code.
clone.lighting_G:SetPrimaryPartCFrame(clone.lighting_G.CFrame * CFrame.Angles(0,math.rad(180),0))