From 5fe626948a562eaa48517ef46ff6134916243abb Mon Sep 17 00:00:00 2001
From: Collin Guarino <collin.guarino@gmail.com>
Date: Wed, 24 Feb 2016 19:51:00 -0500
Subject: Implemented Light.Brighten to complement Light.Dim

---
 light.go | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

diff --git a/light.go b/light.go
index cc4b502..8c79e8a 100644
--- a/light.go
+++ b/light.go
@@ -12,6 +12,7 @@ import (
     "fmt"
     "time"
     "errors"
+    "log"
 )
 
 // Light struct defines attributes of a light.
@@ -204,6 +205,28 @@ func (light *Light) SetBrightness(percent int) error {
     }
 }
 
+
+// Light.Brighten will increase LightStruct.Bri by a given percent (integer)
+func (light *Light) Brighten(percent int) error {
+    if percent > 0 && percent <= 100 {
+        originalBri := light.State.Bri
+        increaseBri := float32(originalBri)*float32((float32(percent)/100.0))
+        newBri := uint8(originalBri+int(increaseBri))
+        if newBri > 254 {  // LightState.Bri must be between 1 and 254 inclusive
+            newBri = 254
+            log.Println("Light.Brighten state set over 100%, setting brightness to 100%. ")
+        }
+        lightState := LightState{On: true, Bri: newBri}
+        err := light.SetState(lightState)
+        if err != nil  {
+            return err
+        }
+        return nil
+    } else {
+        return errors.New("Light.Brighten percentage is not between 1 and 100. ")
+    }
+}
+
 // Light.SetState modifyies light attributes. See `LightState` struct for attributes.
 // Brightness must be between 1 and 254 (inclusive)
 // Hue must be between 0 and 65535 (inclusive)
-- 
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