I presume that you're using a simple emissions tester, which is fine. But the original tube manufacturers never established a spec value for emssions. And, I don't necessarily think that the difference between, say, 50% and 100% represents a factor of two in life, performance, etc.

Here's how I would interpret your results: the tubes in the "green" should be fine. The tubes in the "red" may be fine, too. Just try them. If you get flakey performance, you can try a different tube to see if it makes a difference.

The most important test is to verify that the heater is OK and that there are no shorts in the tube. I think most tube testers can check for shorts, and if the tube lights, then the filament is good.