Do a led strip

Is it possible create a long light “like a led strip” that emits light uniformly?
I tried all the lights but only the source light has the effect I want

Directional lights work wonders in this situation! Just drag in a directional light from the lights tab in the object browser and angle it as needed! This will emit light in a single direction throughout a whole level, without shadows warping like that. Hope this helps!

Perhaps rectangle light is what you’re looking for:

yes I want something like that but not a sun, i need it in enclosed spaces

I thought so too, but it does not emit uniform light, one can also understand from this note that they wrote
"Note that Rect Lights project their IES profiles from the center of the light, not along the edges of the light’s rectangular area. This may produce unexpected results. "