Suggestions for this lighting technique?

[RRRR]

Hi, I have been trying to achieve a similar look to these photographs, at the link below. My work is similar to this, in that I use pretty long exposures with mixed lighting to achieve these color casts. However, this technique of long exposures, dark images, doesnt work so well when I now what to get the models sharp....Does anyone know how he achieves this look of color casts with sharp models..what kind of lighting do you think he is using and how is it positioned? I am well versed in digital retouching, but would like to achieve this in camera if possible. Thanks everyone!! Anything would help!
http://shotview.com/artists/luis-sanchis/vogue-gioiello
http://shotview.com/artists/luis-sanchis/sz

 

[Big Mike]

The use of colored 'gels' is often used to control the color of light.

 

[RRRR]

thanks! anyone else?