@ DaM...sounds to me like you're running a BETA vesion and that may be the answer to your query in the Bryce speed post you made...the final I believe had some serious changes made that sped it up quite a bit IIRC.. ...and yes Lightning is still a part of the full package.. ...

 

Once in a while I look around,
I see a sound
and try to write it down
Sometimes they come out very soft
Tinkling light sound
The Sun comes up again