“Lumina” (** out of four) was an overlong, overly derivative sci/fi shock thriller about four friends (Emily Hall, Andrea Tivadar, and others) who search for their friend who has been abducted which takes them from various U.S. deserts to the sands of Sahara and brings them in contact with evil and otherworldly forces. Writer/director Gino McKoy shows some colorful talent and film is well-lensed and produced but outwears its welcome and wears thin at two hours. Eric Roberts picks up a couple of bucks in another token cameo role.