Code

///Create Event
application_surface_draw_enable(false);

var camera = view_get_camera(0);
var cam_width = camera_get_view_width(view_camera[0]);
var cam_height = camera_get_view_height(view_camera[0]);

light_surface = surface_create(cam_width, cam_height);

alpha = 0.5;



///Clean Up
application_surface_draw_enable(true);



///Draw End
var camera = view_get_camera(0);

if (!surface_exists(self.light_surface)){
	var cam_width = camera_get_view_width(view_camera[0]);
	var cam_height = camera_get_view_height(view_camera[0]);

	self.light_surface = surface_create(cam_width, cam_height);
}

surface_set_target(self.light_surface);
draw_clear(c_black);
camera_apply(camera);

gpu_set_blendmode(bm_subtract);

with (obj_street_light){
	if (image_index == 1){
		draw_sprite(spr_light_source,0,x+13,y-2);
	}else if (image_index == 2){
		draw_sprite(spr_light_source,0,x-13,y-2);
	}else{
		draw_sprite(spr_light_source,0,x,y);
	}
}

gpu_set_blendmode(bm_normal);

surface_reset_target();



//Post Draw

draw_surface(application_surface,0,0);

draw_set_alpha(alpha);
draw_surface_stretched(self.light_surface,0,0, window_get_width(), window_get_height());
draw_set_alpha(1);
window_center();