lighting stuff

Hi. I'm quite new to GL, and trying to add some lighting to my little 3d engine.
I'm a little confused by the positioning of a light... are the coordinates in local object space, so that I have to tranform the global coords to each objects space bvefore calling glLight(GL_POSITION,... ), or have I done something else wrong? (the lighting behaves rather strangely when I try to specify the position in global coordinates)
thanx,
/rikard

[Bob]

If you want to place you light in world space coordinates, you need to set it AFTER the modelview matrix is set. The light position is transformed using the modelview matrix.

[julien]

How did you setup the light position ? Because there are different kind of lioghts, there are positional and directional lights. It depends on the position value you give to opengl :

{x, y, z, 0.0} is a directional light
{x, y, z, 1.0} is a positional light

I hope that it will help you.