Basically you are asking what most of us have learned through trial and error.
History:
A long time ago, we thought it would be a good idea for people new to mapping to list their problems and the solutions
they found, so we could generate a noob's guide.
This didn't occur, because as most of us are aware, once you get started in level design, you learn as you go and don't have time to jot things down.
The next best thing was to post tutorials on basic concepts to help people get an understanding of the simple things.
The best site I found for explanations of 'how it works' was
Firebinders Test Chamber.
This is limited to theory of level design, but gives the viewer some good insights into the way HL works.
I doubt anyone has the time to write up a tutorial, or wiki on the most common basics of design... and I wish M_gargantua all the best in rewriting the 200 entities with full interactive linking.
What is it about the tutorial 'light' that lacks what you need? Maybe we can add to that?
1292 topics about
Light have been discussed in the forums, if the answer is not there... let us know