Irrlicht Engine

i've load .bsp map within .pk3 with VC#.net 2005.
i'd like to make a dark room for my first person shooting game.
-My problem is How to switch the light of a map off ?
........because the Q3map has its own light but i need it to be dark and use a light source which i created it myself.

thank

i've should post it in irrlicht.NET forum.

however, please answer my question

Or maybe the beginner's section? Should be ok here.
BSP use lightmaps, i.e. textures which are used to lighten up parts of the scenery. this is much faster than dynamic lighting and produces very good results for non-moving lights. So in order to change the static lightmap lighting you have to change the textures or change the materials to use darker lightmap settings (there are three lightmaps with different light strength). If the materials are set to use dynamic light lightmaps you can also use dynamic light sources to create the desired effects. You may have to change all materials manually from within your code, though.