diff --git a/Lighting.cpp b/Lighting.cpp
index 4c9471c..6aefd2c 100644
--- a/Lighting.cpp
+++ b/Lighting.cpp
@@ -61,6 +61,8 @@ void Lighting::updateRGB(int now) {
 
 void Lighting::updateWhite(){
 	float brightness = (_heatIndex - 0.5) / 0.5;
+	if (brightness<0)
+		brightness = 0;
 	analogWrite(_whitePin, 1024 * brightness);
 }