I have 6 XM-L CW's and one WW all on stock stars, 3 CW's on 20mm stars, 1 on a 25mm round, 2 on 16mm rounds and the 1 WW on a 14mm round. All tested and verified working.
If you receive them and one isnt working I have 6 others I'm keeping for test bench emitters / random projects so I can replace any but again, I've just now tested them all and they all light at 2A just fine.
Price is $10 + shipping for the whole thing ($3 CONUS, $10 international), they're sold as a lot and I wont sell the CW's individually but I would sell the one WW alone for $5 shipped if you want just it.
