diff --git a/selfdrive/ui/ui.cc b/selfdrive/ui/ui.cc
index 5d6b6c5722..a9c593b558 100644
--- a/selfdrive/ui/ui.cc
+++ b/selfdrive/ui/ui.cc
@@ -326,7 +326,7 @@ void Device::resetInteractiveTimeout(int timeout) {
 
 void Device::updateBrightness(const UIState &s) {
   clipped_brightness = offroad_brightness;
-  if (s.scene.started && s.scene.light_sensor > 0) {
+  if (s.scene.started && s.scene.light_sensor >= 0) {
     clipped_brightness = s.scene.light_sensor;
 
     // CIE 1931 - https://www.photonstophotos.net/GeneralTopics/Exposure/Psychometric_Lightness_and_Gamma.htm
@@ -337,7 +337,7 @@ void Device::updateBrightness(const UIState &s) {
     }
 
     // Scale back to 10% to 100%
-    clipped_brightness = std::clamp(100.0f * clipped_brightness, 10.0f, 100.0f);
+    clipped_brightness = std::clamp(100.0f * clipped_brightness, 5.0f, 100.0f);
   }
   RETURN_IF_SUNNYPILOT
   
@@ -377,4 +377,4 @@ Device *device() {
   static Device _device;
   return &_device;
 }
-#endif
\ No newline at end of file
+#endif