A gas hob includes at least one gas burner, at least one pan support which is used to place a food container over a gas burner, and at least one operational control andor display element which is arranged on the gas hob. Two avenues are explored: the first is to maximize the \u03b8-average divergence between the class densities and the second is to minimize the union Bhattacharyya bound in the range of \u03b8. The light generator or LED can be operated either in the avalanche mode or in the forward mode. The sector plate, in the splayed-out position, may be positioned underneath the bottom exposed edge of the pipe or into the internal groove provided in the pipe as the case may be.