diff --git a/selfdrive/ui/sunnypilot/ui_state.py b/selfdrive/ui/sunnypilot/ui_state.py
index ff05525596..aeb344d2b9 100644
--- a/selfdrive/ui/sunnypilot/ui_state.py
+++ b/selfdrive/ui/sunnypilot/ui_state.py
@@ -99,6 +99,7 @@ class UIStateSP:
     self.onroad_brightness = self.params.get("OnroadScreenOffBrightness", return_default=True)
     self.onroad_brightness_timer_param = self.params.get("OnroadScreenOffTimer", return_default=True)
 
+    self.global_brightness_override = self.params.get("Brightness", return_default=True)
     self.interactive_timeout = self.params.get("InteractivityTimeout", return_default=True)
 
 
diff --git a/selfdrive/ui/ui_state.py b/selfdrive/ui/ui_state.py
index 6b94666d12..a38cd76352 100644
--- a/selfdrive/ui/ui_state.py
+++ b/selfdrive/ui/ui_state.py
@@ -259,9 +259,19 @@ class Device(DeviceSP):
       else:
         clipped_brightness = ((clipped_brightness + 16.0) / 116.0) ** 3.0
 
+      if gui_app.sunnypilot_ui():
+        if ui_state.global_brightness_override == 1:
+          clipped_brightness = float(np.clip(100.0 * clipped_brightness, 1.0, 100.0))
+        elif ui_state.global_brightness_override == 0:
+          clipped_brightness = float(np.clip(100.0 * clipped_brightness, 10.0, 100.0))
+
       clipped_brightness = float(np.interp(clipped_brightness, [0, 1], [30, 100]))
 
     brightness = round(self._brightness_filter.update(clipped_brightness))
+
+    if gui_app.sunnypilot_ui() and ui_state.global_brightness_override not in (0, 1):
+      brightness = ui_state.global_brightness_override
+
     if not self._awake:
       brightness = 0