I think apache server is best for your PHP websites.
You can use apache server for your website.
Lighthttpd is better but its fairly newer and not used as much. Apache is more used, and has more tuts on its which give it the edge. Lighthttpd is slightly faster then Apache is though. I haven't benchmarked either on speed, processing speed, memory usage etc... but since Apache is the most used on web hosts and business servers it gets my vote and I use it over Lighthttpd all the time.
php embed to iis server on window is a good idea