Lights doesn't contrast to the color of the stained glass near the light source

What I think it supposed to be is that when there is a stained glass near a light source, it will make the lights become what the stained glass color (like what 2015-07-10_23.00.44R.png shows). But what I get is that even though there is a red stained glass, the light stays at a white color (like 2015-07-10_23.00.44.png)

-lVincentl