Thanks for the help !!! I have uploaded a tittle demo with the lighting system. Lights gradient are in one layer and affetcs only to ground texture. The main character and "future" objects are tinted with filter RGB manipulation depending lights color. The physiscs are also event based.
Right click to move [url:1ahdtuhr]http://files.getdropbox.com/u/472186/Construct/Forums/Cap/lights.zip[/url:1ahdtuhr]