Can't get emmissive material to emit

[m2tts]

I'm trying to use a curved plane to add some fill light, but I can't seem to get the plane to cast any light on the scene at all. I've tried upping the global illumination numbers and tried setting the material to 500; still not casting any light. If I have "show up in reflections checked, then it shows up on the parts, but I want it to light the scene, not be seen in reflections.