Displaying Time in Highchats

I'm developing a page and in case I need a sequence of graphs that will display certain results, the problem is that one of the charts is relative to the amount of hours and I need to display that amount of hours. In case, these data are coming from a database and I in PHP do the time conversion in Seconds to H: M: S but Highcharts can not display ... I already tried using Format and DateFormat but to no avail. In case what could be done, follow below the code

<script type="text/javascript">

    $(function () {
        $('#container2').highcharts({
            chart: {
                type: 'column'
            },
            title: {
                text: 'Tempo Médio de Resposta por Operadora'
            },
            subtitle: {
                text: 'Fonte: <a href="http://sirea.caixa">SIREA</a>'
            },
            xAxis: {
                type: 'category',
                labels: {
                    rotation: -45,
                    style: {
                        fontSize: '8px',
                        fontFamily: 'Verdana, sans-serif'
                    }  
                }
            },
            yAxis: {
                min: 0,
                title: {
                    text: 'TMR(Hs)'
                }
            },
            legend: {
                enabled: false
            },
            tooltip: {
                pointFormat: 'Incidentes por Operadora: <b>{point.y:.0f}</b>'
            },
            series: [{
                name: 'Incidentes por Operadora',
                'colorByPoint': true,
                data: [
                    <?  
                        for ($i=0 ; $i < $totalOpe  ; $i++ ) { 
                            echo "['".$OpeX[$i]."','".$TmrX[$i]."'],"; //A variavel TmrX é um vetor das unidades Tratadas de Segundos para H:M:S 
                        }
                    ?>  
                ],
                dataLabels: {
                    enabled: true,
                    rotation: -90,
                    color: '#000080',
                    align: 'right',
                    format: '{y}', //No caso é aqui que já mudei várias opções de format
                    y: -28, // 10 pixels down from the top
                    style: {
                        fontSize: '10px',
                        fontFamily: 'Verdana, sans-serif'
                    }
                }
            }]
        });
    });     
    </script>   

In Case, the two variables in question are TmrX [$ i] in PHP and p y in Jquery Highcharts.

What can I do in this case?