Saving a map on gtkradiant with light takes more than 12 hours for a room!?

Hello guys ,

I've recently made a map and I wanna know why does it take like 12hours + to save map as light, you know building it is done and I wanna compile it so it just takes lots of time.

I tried saving with nolight and it works , but without light the map misses its' biggest advantage ..

Any help or ideas =\ .. my map isn't that big!

save it as fast light. If your map and your lightmaping skills arent advanced, you wont see diference betwen light and fast light.