Is there a simple diffuse+emissive shader that would work for iPad?

Hey there everyone, I'm pretty new to Unity but I've don a lot of work in UDK. I'm used to being able to edit and play with materials as I see fit, but from what I can tell that's not something you can easily do in Unity (without being able to code, at least). Sorry if I'm asking an obvious question!

In short: Can I add an emissive map to a material, and make only certain sections of it glow? If so, would it work on iPad or any other iOS devices?

In my project, I have a wall material that I want to have golwie "LED" like lights on it. Nothing too fancy, no animated textures or panning or what have you, but I want these lights to shine without the rest of the wall also being emissive. I tried using a self-illuminated shader, but it looks like the entire wall glows as well as the lights. I have a separate texture for the emissive map, and the rest of the wall is "black" (ie, shouldn't give off light) but that doesn't seem to be the case. I haven't built the scene yet though, so perhaps its just as simple as just hitting the build button to make it work?

I did some research, and heard about being able to use an alpha mask to add emissive to a material, but honestly I don't want to start adding and editing shaders if I don't have to, so I came here first.