I know this is an old topic BUT it comes up in searches.
The advice this poor guy received was entirely WRONG! and dangerous! NO - You cannot just tap into a neutral in a light fixture or electrical box.
And NO - you cannot just run a neutral wire on the outside of your conduit or cable!
The diagram from the manufacturer was correct. Why second-guess it? (that is - unless you want to void your warranty and have a dangerous install!)
To anybody reading this forum in the future, disregard the information and advice given in this thread! AND
If you are unsure of how to install the electrica