Could explain how to use light entities effectively? Every time I use them, the light just looks so white and unrealistic,
A few other things worth noting...
1. You can target light ents. I guess the standard would be to use "target" "target1" on the light ent, and "targetname" "target1" on a info_null ent. Lets you play with some angles and tough to reach corners. The info_null ent should be ~128 units away.
2. Can use "_cone" on lights ents to change the radius of the light. Default is 10. I think it mentions this in bsp, but it let's you make spotlights or wider circles etc.
With a combo of these two, and color mentioned above, you should be able to do everything but the weird cases, where style comes in. I don't see it used properly in pb often, but I've seen quite a few q2 maps use the flickering and a couple others well. Works nice for a "broken" or "underground" theme.
3. Can use "style" to change flicker and few other things.
style 1 - flicker
style 2 - slow strong pulse
style 3 - candle
style 4 - fast strobe
style 5 - gentle pulse
style 6 - candle
style 7 - candle
style 8 - slow strobe
style 9 - flourescent flicker
style 10 - slow pulse, almost fading to black