Stefan--thanks for posting. The 2nd half with the 85b filter did look like it had less noise, but it also seemed like the image was contrastier. So if the contrast increases with the tungsten balance/85b filter, it might be a matter of the noisy blacks in the image getting crushed. Just thinking out loud here.
Khmuse--go for it, man. Your test should give some indication if there's any noise related UV effect. I would add a control of full spectrum light to your experiment, to make sure it's not just a general effect, but UV specific.
Khmuse--go for it, man. Your test should give some indication if there's any noise related UV effect. I would add a control of full spectrum light to your experiment, to make sure it's not just a general effect, but UV specific.