Just installed one today. Could not believe how well it helps with orientation. Works equally well day or night. I drilled a hole in the battery door and mounted with hot glue. One of the best add ons I have seen yet. Did not effect battery light at all.
http://www.ebay.com/itm/DJI-Phantom-Qua ... 0867103190
http://www.ebay.com/itm/DJI-Phantom-Qua ... 0867103190