Wood preservative compositions are disclosed. The control module is adapted to monitor sensing devices of the internal combustion engine, and is adapted to execute algorithms. A single pyrotechnic element is connected to the energy source at any one time, the elements preceding it having already been used. By selection of the fiber transmission numeric aperture the impact of exciting and ambient light on the measurement is minimized. The optimization of the program can therefore take into consideration changes made during prior compilations and optimization and the results of the changes.