[argyllcms] Spectroradiometric measurements

Hello!
Sorry for off-topic question, but I believe someone will be able to answer.
At the university I have the opportunity to use Photo Research PR-650 Spectroradiometer
http://www.photoresearch.com/current/pr650.asp
The data that I get from this instrument are spectral power distribution from 380 to 780 nm with 4nm interval and in W/m^2*nm.
The question is are those spectral data directly usable to calculate CIE tristimulus values or should I somehow normalize
those spectral values.

Thank you in advance,
Best regards
Andrej Javorsek

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