No.
That's basically your answer. HL2 had a
huge budget, poweful tools, and professional artists all working together to create things like the top-notch lighting. Basically, in FPSC, you're working on a much smaller scale. You don't have a million dollar budget, or really powerful tools, or professional artists (well, it's unlikely). FPSC's engine is simply incapable of processing that level of lighting and the simple fact is that it really never will.
However, static lighting is something that is very flexible. You can create lighting in the texture, which works brilliantly and naturally doesn't burn performance. But basically, no, you won't be able to have dynamic lighting (as in, lamps swinging as the light sways across the floor accurately to the lamp's direction) anywhere near the quality of a AAA game like HL2.
Remember--with FPSC, you're not going to make HL3 or Doom 4. Making games is excrutiatingly hard work--FPSC provides a very, very easy way to getting into that realm, but naturally at the compromise of a complex and AAA engine. This is a $50 program we're talking about here. Licensing something like the Source engine? Thousands upon thousands.
Evil has a new name. Demo out now!
