I'm not sure if this is the right place to put this little building tutorial but I guess I'll find out.
There is a little trick to get a brick to turn its rendering off without the light source being effected, I've noticed that a lot of people actually don't know about this trick so I figured I'd post it.
Many people know that if you turn off rendering on a brick the light source on the brick will disappear with it, as previewed;
So people usually just give it the fully transparent color, which worked before shaders but now you can see them somewhat easily;
(usually even easier then the previews if you use different skybox lighting but I was on DragonoidSlayers Steampunk and couldn't change it.)
So if you just do one more step and give that brick an fx after you give it the completely transparent color it should totally turn its rendering off without effecting the light source as previewed;
Doing it this way completely makes sure that players will not see the brick that's emitting light, which is great for dynamic lighting.
Feel free to keep doing this your own way, I just thought I'd share.