I got a yellow one year before last, Alex found a green & yellow one last year. http://www.tantivexi.com/t1737-lightsaber-mystery-different-sculpt-or-worrying-reproduction
The yellow one is actually noted as real on Jawas armoury!!
& in the Japanese archive database book.
Due to distinct differences in the mould I am positive they are fakes. Luke Jedi has been a well researched figure for example ( & Luke Bespin) right down to the craziest detail matching factory codes, to figures to sabers and blasters etc. These sabers' details do not match any known MOC examples.
note side injection point . The blue saber is unique to HN 'Hong Kong' so quoting Wolff " if we still needed a proof that those are fake the blue one does the job. One mold to blue is original....only one. The fact that this mold exists in all three colors is the last nail to the coffin "