yeah sure you can do this..for each light object say you have a function like this:
Code:

---

function check_visibility()
{
	var screenpos[3];
	
	while(1)
	{
		vec_set(screenpos.x,my.x);
		
		if (vec_to_screen(screenpos,camera)!=0)
		{
			my.lightrange=0;

		}
else{my.lightrange=light_range;}

		
		wait(1);
	}	
	
}  

---