Problem with light-emitting shaders

[Boothand]

I've been trying to create a corridor where I want the lighting to be completely even. I've tried to do this by using light-emitting shaders, such as this:

 

textures/Bootland/bricks2_emit
{
	qer_editorimage textures/Bootland/bricks2.tga
	q3map_lightimage textures/Bootland/bricks2.tga
	q3map_surfaceLight 30
	{
	map $lightmap
	rgbGen identity
	}
	{
	map textures/Bootland/bricks2
	blendFunc filter
	rgbGen identity
	}
}

It does, however, not become even. Some areas of the wall are dark, some have round bright spots, as if a light was placed randomly around.

 

https://dl.dropboxusercontent.com/u/58757568/surfacelight4.jpg

 

Does anyone know a way to fix this?