Use or what they have R&D'd would be more appropriate. Lots of small even garden lighting like fixtures have been made and also versions long gone - but the main version of such lights.
Starting out in definition, a
Birdie should be a 12v MR-16
PAR can low
voltage fixture.
It should not be considered a
PAR 20 or MR/PAR16
line voltage fixture - definition wise.
I don't think there are any MR-16/.20
LED Birdies on the market at the moment. Possibly a skip in generations of
LED node technology which probably is a good thing. Believe sources like SuperbriteLED's have discs of
LED nodes which would fit in a concept of a
Birdie shell, but I would wait. In looking at other things,
ETC I might have seen a
LED birdie from them also, but only might. Recently bought some small
RGB lights of about the size from USLED supply of approximate size, you get punch but they were limited in
stock/versions and seemingly development of its concept - still developing doing it. Requires a special decoder for such a thing.
I would wait if you can for technology to come to date, and also check all websites for lights you can think of for if someone else has it. Than wait a year for a better and more powerful/cheaper light
fixture for what you are now wanting.