Hoku Scientific Announces Earnings Conference Call for First Quarter Fiscal Year 2009

Hoku Scientific, Inc. (NASDAQ: HOKU), a materials science company focused on clean energy technologies, announced today that it will hold a conference call with investors and analysts on Wednesday, July 16, 2008 at 5:00 p.m. Eastern Time to discuss results for the Company's first quarter fiscal year 2009 ended June 30, 2008 and the Company's business outlook.

The news release announcing the first quarter fiscal year 2009 results will be disseminated over a national wire service on July 16, 2008 after the market close. The press release will be posted at the Company's website: www.hokuscientific.com.

The dial-in number for the live audio call beginning at 5:00 p.m. Eastern Time is (719) 325-4911. A live webcast of the conference call will be available on Hoku's website at www.hokuscientific.com.

A replay of the call will be available shortly after the conclusion of the call via the web at www.hokuscientific.com. The webcast will be recorded and available for replay until the Company's conference call to discuss its financial results for its second quarter of fiscal year 2009.

About Hoku Scientific

Hoku Scientific (NASDAQ: HOKU) is a diversified clean energy technologies company with three business units: Hoku Materials, Hoku Solar and Hoku Fuel Cells. Hoku Materials plans to manufacture, market, and sell polysilicon for the solar market from its plant currently under construction in Pocatello, Idaho. Hoku Solar markets and installs turnkey photovoltaic systems in Hawaii. Hoku Fuel Cells has developed proprietary fuel cell membranes and membrane electrode assemblies for stationary and automotive proton exchange membrane fuel cells. For more information visit www.hokuscientific.com.