diff --git a/src/GBACart.cpp b/src/GBACart.cpp
index 4fd42894..a62aca6b 100644
--- a/src/GBACart.cpp
+++ b/src/GBACart.cpp
@@ -582,6 +582,11 @@ int CartGameSolarSensor::SetInput(int num, bool pressed)
     return -1;
 }
 
+void CartGameSolarSensor::SetLightLevel(u8 level) noexcept
+{
+    LightLevel = std::clamp<u8>(level, 0, 10);
+}
+
 void CartGameSolarSensor::ProcessGPIO()
 {
     if (GPIO.data & 4) return; // Boktai chip select
diff --git a/src/GBACart.h b/src/GBACart.h
index f6fb95dd..726a234d 100644
--- a/src/GBACart.h
+++ b/src/GBACart.h
@@ -158,6 +158,8 @@ public:
     void DoSavestate(Savestate* file) override;
 
     int SetInput(int num, bool pressed) override;
+    void SetLightLevel(u8 level) noexcept;
+    [[nodiscard]] u8 GetLightLevel() const noexcept { return LightLevel; }
 
 protected:
     void ProcessGPIO() override;