A two phase fuel oil atomizer utilizing a secondary media such as high pressure steam or air to assist in the atomization of heavy fuel oil, while reducing NOx and other polluting emissions. The light source emits a single optical radiation pulse in pulse mode to spot treat a portion of a skin surface during the dermatologic treatment, and the light source emits a continuous sequence of optical radiation pulses in strobe mode to treat multiple locations on the skin surface during the dermatologic treatment. One such advantage is the natural trellis structure of a multiple modulation index continuous phase modulation signal. The seat occupant is decided to be of one of the first and second categories associated with the value.