Heard a lot of feedback on green welding lenses, since 1989.
"Better than Burts" has been heard a time or two, on the other hand ...
Every welder has hissown particulars .....
..... Hanna, Epperle, Hagemann Sr, Troutman, Tweit, Remington, Berger ....
...... so many fab guys over so many years .....
FYI, "Shade" or "darkness/shading" of welding filter:
Burts are the S4 shade, "Light" shade for some brazing, welding some aluminum, (according to the AWS specs for welding filters.)
TM2000 are the S5 shade, "Standard" shade for general gas welding - including:
Welding steel, 4130, stainless alloys, cast iron .... and aluminum.
Meets ANSI Z87, current dates.
(Gotcher Cobalts?)