Lighting for indoor Visible+IR photography

[giancarloflores]

Hello everybody!

I'm going to take some indoor pictures with a modified Nikon D70s (Visible + IR enabled). I want the pictures to contain light within the range 450nm to 1050nm (450nm-700nm is "visible light", 700nm-1050 is "near IR"). The "subjects" will be soil samples, 1m x 1m, artificially illuminated.

The guy who first took this kind of pictures used two 500W tungsten filament floodlights to illuminate the samples. Do you think this is still a good lighting option? Or do you know a better one for visible + IR photography?

Thanks a lot!