| Value | Category | 
                                    
                    
                        | 1 | kerosine/paraffin | 
                                    
                    
                        | 2 | electricity | 
                                    
                    
                        | 3 | candle | 
                                    
                    
                        | 4 | diesel | 
                                    
                    
                        | 5 | open fire | 
                                    
                    
                        | 6 | torch | 
                                    
                    
                        | 7 | solar panel | 
                                    
                    
                        | 8 | other | 
                                    
                    
                        | 9 | none | 
                            
            Warning: these figures indicate the number of cases found in the data file. They cannot be interpreted as summary statistics of the population of interest.