diff --git a/lights.js b/lights.js
index 42d1601..5efc9f5 100644
--- a/lights.js
+++ b/lights.js
@@ -82,12 +82,12 @@ function fade(index) {
   var diff_cg = current.g - original.g;
   var diff_b = final.b - original.b;
   var diff_cb = current.b - original.b;
-  var sign_r = diff_r == Math.abs(diff_r) ? 1 : -1;
-  var sign_g = diff_g == Math.abs(diff_g) ? 1 : -1;
-  var sign_b = diff_b == Math.abs(diff_b) ? 1 : -1;
-  var interval_r = sign_r * Math.ceil(Math.abs(diff_r / fade_ticks));
-  var interval_g = sign_g * Math.ceil(Math.abs(diff_g / fade_ticks));
-  var interval_b = sign_b * Math.ceil(Math.abs(diff_b / fade_ticks));
+  var sign_r = diff_r === Math.abs(diff_r) ? 1 : -1;
+  var sign_g = diff_g === Math.abs(diff_g) ? 1 : -1;
+  var sign_b = diff_b === Math.abs(diff_b) ? 1 : -1;
+  var interval_r = sign_r * Math.ceil(Math.abs(diff_r) / fade_ticks);
+  var interval_g = sign_g * Math.ceil(Math.abs(diff_g) / fade_ticks);
+  var interval_b = sign_b * Math.ceil(Math.abs(diff_b) / fade_ticks);
 
   var current_tick_r = Math.abs(Math.floor((diff_cr / diff_r) * fade_ticks));
   var current_tick_g = Math.abs(Math.floor((diff_cg / diff_g) * fade_ticks));