>> >>>CFL 2700k >> >>Well there you go. Replace those with some 5500K units >and >>your problem will disappear. >> >Why would cooler light be better if the WB is balanced in >Lightroom ?
This is a LONG discussion that I don't really have time to go into right now (lots going on here at work) but the quick and dirty is that white balancing is really tuning sensitivity. Sensors are usually daylight balanced. Meaning that the closer the light signal coming into the camera is to daylight, the less noise will be generated in the recorded photo. As you begin veer away from daylight balance, the white balance mechanism must attenuate part of one signal and amplify the other. The more it has to amplify a signal, the more noise you are going to get. A signal down at 2700K is so devoid of blue light, that the camera is having to do 100% amplification on that signal just to get it into balance. And the noise becomes obvious.
In video / motion picture, this is something that we faced all the time, learned how to deal with, and get good results from. It's also why nearly ALL movies are shot with daylight balanced fixtures. Even practicals on set (table lamps, bedside lamps, etc.) are re-bulbed with daylight fluorescent.
Go to the store, get a few 5500k fluorescent bulbs, and watch your problems magically go away.