From 2c343241a6f73179bc1ff869141b2d50875e77f8 Mon Sep 17 00:00:00 2001
From: Robert Marshall <rob@robware.uk>
Date: Thu, 29 Nov 2018 22:17:32 +0000
Subject: [PATCH] Make sure that we don't output value less than 0. This was
 causing lights to stay on.

---
 Lighting.cpp | 2 ++
 1 file changed, 2 insertions(+)

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);
 }