Videomaker – Learn video production and editing, camera reviews › Forums › Technique › Miscellaneous Techniques › Please clarify a basic lighting question for me! › As Bowens points out, colour
As Bowens points out, colour temperature will vary with tungsten lights as you dim them. Take a look at a Kelvin scale shart and you'll see that it will get redder as you dim them.
As has already been mentioned, there are numerous ways to offset this by using scrims, diffusion material, distance, etc. and I've used all of these at various times.
If I don't have any of these at hand on a shoot, I will use dimmers and then do a white balance once I have things lit the way I want. If I'm adding any coloured gels to my lights, I do my white balance before I add the gel to my lights.
BTW, having a properly calibrated video monitor on set is a huge bonus as you can instantly see if what you trying to achieve is actually working.