Qt Quick 3D - Lights Example

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 import QtQuick
 import QtQuick.Controls
 import QtQuick.Layouts

 Item {
     property alias sliderValue: slider.value
     property alias fromValue: slider.from
     property alias toValue: slider.to
     readonly property bool highlight: slider.hovered || slider.pressed

     width: rowLayout.width
     height: rowLayout.height

     RowLayout {
         id: rowLayout
         Slider {
             id: slider
             from: fromValue
             to: toValue
             stepSize: 0.01
             Layout.minimumWidth: 200
             Layout.maximumWidth: 200
             background: Rectangle {
                 x: slider.leftPadding
                 y: slider.topPadding + slider.availableHeight / 2 - height / 2
                 implicitWidth: 200
                 implicitHeight: 4
                 width: slider.availableWidth
                 height: implicitHeight
                 radius: 1
                 color: "#222840"

                 Rectangle {
                     width: slider.visualPosition * parent.width
                     height: parent.height
                     color: "#848895"
                     radius: 1
                 }
             }
             handle: Rectangle {
                 x: slider.leftPadding + slider.visualPosition * (slider.availableWidth - width)
                 y: slider.topPadding + slider.availableHeight / 2 - height / 2
                 implicitWidth: 20
                 implicitHeight: 20
                 radius: 5
                 color: slider.pressed ? "#222840" : "#6b7080"
                 border.color: "#848895"
             }
         }
         Label {
             id: valueText
             text: slider.value.toFixed(2)
             color: "#222840"
             font.pointSize: 12
             font.bold: true
             Layout.minimumWidth: 80
             Layout.maximumWidth: 80
         }
     }
 }