And I wanted to replace the light_spot entity with a sprite and a model at the same time, so the sprite would show the lights color, and an arrow points into the direction of the angle of the light_spot.
The only thing is, that I never learned how to model for HL and well I think it might me too much to learn it simply for that reason. Dunno
Anyway what really would help me would be, if someone could make a simple arrow in HL mdl format, to be used in the Hammer editor for that purpose. I thought about something like this

But you don't have to stick to that, as long as it is just a nice simple arrow, with the origin in the start and pointing to the right. The color of it should be something like red or so.
So if anyone wants to help me I would be quite happy about it