Whenever I try to create a new light, it shows in the animation set editor but not visually in the viewport. I can still move it around, but it does not appear at all through the rendering. I don't know whether this is my problem or SFM's, but I have used the old version of SFM and it did work. I also discovered that the light does affect things like Radiant crystal on the dota map and in some particle objects. Thanks for helping.