Update light.yeelight.markdown (home-assistant#1447)

SilvrrGIT · fabaff · commit 3587076d2ed2 · 2016-11-16T22:11:59.000+01:00
diff --git a/source/_components/light.yeelight.markdown b/source/_components/light.yeelight.markdown
@@ -31,7 +31,7 @@ Configuration variables:
 
 <p class='note'>
 Before trying to control your light through Home Assistant, you have to setup your bulb using Yeelight app. ( [Android](https://play.google.com/store/apps/details?id=com.yeelight.cherry&hl=fr), [IOS](https://itunes.apple.com/us/app/yeelight/id977125608?mt=8) ).
-In the bulb property, you have to enable "Developer Mode"
+In the bulb property, you have to enable "Developer Mode"  Developer mode may only be available with the latest firmware installed on your bulb.  Firmware can be updated in the application after connecting the bulb.
 Determine your bulb ip (using router, software, ping ...)
 </p>
 
