EXHIBIT 32.2

                            CERTIFICATION PURSUANT TO
                             18 U.S.C. SECTION 1350,
                             AS ADOPTED PURSUANT TO
                  SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

In connection with the Annual Report of Luminex Corporation (the "Company") on
Form 10-K for the period ended December 31, 2005, as filed with the Securities
and Exchange Commission on the date hereof (the "Report"), I, Harriss T. Currie,
Vice President - Finance, Chief Financial Officer and Treasurer of the Company,
certify, pursuant to 18 U.S.C. Section 1350, as adopted pursuant to Section 906
of the Sarbanes-Oxley Act of 2002, that:

      (1) The Report fully complies with the requirements of Section 13(a) or
15(d) of the Securities Exchange Act of 1934; and

      (2) The information contained in the Report fairly presents, in all
material respects, the financial condition and results of operations of the
Company.

/s/ HARRISS T. CURRIE
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Harriss T. Currie
Vice President - Finance, Chief Financial Officer and Treasurer
March 16, 2006