I've had this fixture for about 1 1/2 years, replaced the lamps about 6 months ago. The MH's are 15,000K. $300.00
http://www.marinedepot.com/Coralife...life-ES53502-FILTFIMHMPMDMLM8-ES53510-vi.html
http://www.marinedepot.com/Coralife...life-ES53502-FILTFIMHMPMDMLM8-ES53510-vi.html