The default photon intensity on a light is 8,000, GI Illum photons are 10,000 I think. The photon intensity on the light seems really low but then again I don't know what you had set the GI scale to. I think the problem is the GI Radius. I see you have FG checked also, can't see the settings there, it could be fighting you're GI settings. Also I see you had to grayscale your screenshot to get it under 200k lol :p, if you have Photoshop, Go to File, go to that save for web and devices option, hit that lil arrow (see the pic), choose optimize to file size and enter whatever number and voila. Really handy.