We just bought a new light equip:
http://www.atek.com.br/imagens/produtos/luz_cont/fluorescente/digilight_m.jpg
4 x 55W (220W)
We are using 2 of these on 45º, 1 pointed from top to bottom and another on middle position.

Our movies are looking yellow, what we should do to avoid this? We did proper WB and original profile setup on the camera (SONY-FX1).

SAMPLE MOVIE (http://www.ncfreehost.com/boards/sample-hd-yellow.wmv)

Do we need get more lights? I was thinking about two of these:
http://www.atek.com.br/imagens/produtos/luz_cont/fluorescente/digital_light_m.jpg
(4 x 45W - (180Watts)) at the bottom to avoid shadows and another (220W) on center.

Any other lightning recommendations?

Thanks,

White balance could correct the problem. Just add a 3 way color corrector filter to the clip and use the eye dropper to set the white balance. You can also use the color wheels to push the color away from yellow (toward blue) to get rid of the yellowish cast.

Ideally, you'd want to set your white balance in the camera on the set by zooming and focussing on a piece of white paper in the same light your subjects will be situated. <edit>Since you're already white balancing, you could white to a slightly yellow card (which will push the camera toward blue a bit) or just gel the lights blue after you WB</edit>

warning for the public: this is an innocuous (unthreatening and safe for workish - other than the watermark in the corner) clip from an adult film.

Those are some pretty nice prices on those lights too :)

White balance could correct the problem. Just add a 3 way color corrector filter to the clip and use the eye dropper to set the white balance. You can also use the color wheels to push the color away from yellow (toward blue) to get rid of the yellowish cast.

Ideally, you'd want to set your white balance in the camera on the set by zooming and focussing on a piece of white paper in the same light your subjects will be situated. <edit>Since you're already white balancing, you could white to a slightly yellow card (which will push the camera toward blue a bit) or just gel the lights blue after you WB</edit>

warning for the public: this is an innocuous (unthreatening and safe for workish - other than the watermark in the corner) clip from an adult film.

Thanks for the tip, dont worked very well but I can see some improvment. I was thinking about some correctiong on the production, will try some gels maybe, on such lightining will be hard to do it but will try.

Im affraid about doing many corrections on editing software cause some of these adjustments dont work well on the playback.

you could also add a blue filter to the lens after white balancing...that would let you forgo adding all that gel to every light.

Thanks for the laugh!

Anyway, to answer your question: If doing everything Cole says did not help, your lights may not be truly white. Check their CRI. It should be over 90.