Beam Width on Light Sources...can it be changed?

[arretx]

So I figured out that I can have light without seeing the light source by using the light sources in the library (go figure, right?).

Now, I'm wondering how to go about finding light sources that have different beam angles for different types of lights to get a more accurate representation of the lights that I actually have in the house.

Where would I go to find something like that?