diff --git a/src/platform/qt/GameController.cpp b/src/platform/qt/GameController.cpp
index b324ce9f3..2fa530ee6 100644
--- a/src/platform/qt/GameController.cpp
+++ b/src/platform/qt/GameController.cpp
@@ -489,6 +489,7 @@ void GameController::setLuminanceValue(uint8_t value) {
 			break;
 		}
 	}
+	emit luminanceValueChanged(m_luxValue);
 }
 
 void GameController::setLuminanceLevel(int level) {
diff --git a/src/platform/qt/GameController.h b/src/platform/qt/GameController.h
index 32cfb2352..d13d0c579 100644
--- a/src/platform/qt/GameController.h
+++ b/src/platform/qt/GameController.h
@@ -79,6 +79,8 @@ signals:
 	void gameFailed();
 	void stateLoaded(GBAThread*);
 
+	void luminanceValueChanged(int);
+
 	void postLog(int level, const QString& log);
 
 public slots:
@@ -109,6 +111,7 @@ public slots:
 	void reloadAudioDriver();
 
 	void setLuminanceValue(uint8_t value);
+	uint8_t luminanceValue() const { return m_luxValue; }
 	void setLuminanceLevel(int level);
 	void increaseLuminanceLevel() { setLuminanceLevel(m_luxLevel + 1); }
 	void decreaseLuminanceLevel() { setLuminanceLevel(m_luxLevel - 1); }
diff --git a/src/platform/qt/SensorView.cpp b/src/platform/qt/SensorView.cpp
index fba647f54..31914f0b4 100644
--- a/src/platform/qt/SensorView.cpp
+++ b/src/platform/qt/SensorView.cpp
@@ -31,12 +31,17 @@ SensorView::SensorView(GameController* controller, QWidget* parent)
 	connect(m_ui.timeNow, &QPushButton::clicked, [controller, this] () {
 		m_ui.time->setDateTime(QDateTime::currentDateTime());
 	});
+
+	connect(m_controller, SIGNAL(luminanceValueChanged(int)), this, SLOT(luminanceValueChanged(int)));
  }
 
 void SensorView::setLuminanceValue(int value) {
-	bool oldState;
 	value = std::max(0, std::min(value, 255));
+	m_controller->setLuminanceValue(value);
+}
 
+void SensorView::luminanceValueChanged(int value) {
+	bool oldState;
 	oldState = m_ui.lightSpin->blockSignals(true);
 	m_ui.lightSpin->setValue(value);
 	m_ui.lightSpin->blockSignals(oldState);
@@ -44,6 +49,4 @@ void SensorView::setLuminanceValue(int value) {
 	oldState = m_ui.lightSlide->blockSignals(true);
 	m_ui.lightSlide->setValue(value);
 	m_ui.lightSlide->blockSignals(oldState);
-
-	m_controller->setLuminanceValue(value);
 }
diff --git a/src/platform/qt/SensorView.h b/src/platform/qt/SensorView.h
index 956f8be1a..bd7ef8f27 100644
--- a/src/platform/qt/SensorView.h
+++ b/src/platform/qt/SensorView.h
@@ -23,6 +23,7 @@ public:
 
 private slots:
 	void setLuminanceValue(int);
+	void luminanceValueChanged(int);
 
 private:
 	Ui::SensorView m_ui;