No error means no lamp out indicator. You could possibly buy them from a US supplier but he will have got them from China and you will then buy them from him at a marked up price.
If that makes you feel it will help make the US great again you can go ahead and buy them from the US supplier. Remember the US makers sent all this stuff overseas to get it made cheaper and now the offshore makers have learnt how to make it and are cutting out the middleman. Blame the makers here for firing their US workers and getting some sweatshop in the far East to make it cheaper.

These are the type of light I am talking about. CLICK