More quick Googling ...
More on
Max Eckhardt---he started the American manufacture of glass Christmas ornaments, which had previously come principally from Germany.
"Polaron" refers to Shiny Brite ornaments made with a coating that resembles porcelain.
"Lunissa" is actually "Lanissa"---it appears to be a West German manufacturer of glass ornaments. Not sure if they were affiliated some way with Shiny Brite. I couldn't find out anything about the company, just a lot of listings for Lanissa ornaments for sale.
Some people use "Shiny Brite" to designate a certain type of ornament, when in fact it was a particular BRAND, so it gets confusing sometimes.
There appear to be quite a few Flickr online photo albums of vintage ornaments, but I haven't investigated them. Try Googling the various terms and see what comes up for you! A Flickr photo album is where I got the "Polaron" information.