had a quick look into the daylight filter, the Wratten 80A Color Conversion. Raises the color temperature, causing a 3200 K tungsten-lit scene to appear to be daylight lit, approximately 5500 K. so that could work nicely as far as I'm aware, most of the construction lamps are in the range of about 2500k-3000k ish. the Main reason I used them was because they cost £4 each lol. that's cheap, useful for some kinda of lighting, but frigging hot lol.

I also just had a play around in CS2, and just playing with the colour temperature on import of the Raw seemed to actually work.. but I have a feeling the last time I tried this I didn't actually have a raw processor, or adobe. so may not have had the tools *shrug* I'm sure I had some real issues with losing colour, but it appears to have gone away lol.