Unity level light and laser seems diffrent after build

I have laser light in my gun.In editor screen everything ok but when i build my game i see diffrent things.One other thing my game lighting is diffrent then editor.Why this is happening ?

Left pic. build Right is in editor.
Pls check this picture:

You can upload images here, even by dragging them into the text editor.

How have you built your laser coming from the gun, how is it different when you build? You need to be a lot more thorough in your explanation.