UPDATE 1-Hoku to cut polysilicon supply to Solargiga unit

* Hoku Materials amends deal with unit of China's Solargiga

* Says will reduce, postpone shipments of polysilicon

* Says all customers now current with their prepayments

April 13 (Reuters) - Hoku Scientific Inc (HOKU.O), which provides raw materials to the solar industry, said its unit will reduce the quantum of polysilicon supplied to a unit of China's Solargiga Energy Holdings Ltd (0757.HK).

The company said its unit, Hoku Materials, will cut the total volume of polysilicon to be sold to Solargiga's Wealthy Rise and will be paid $136 million over a 10-year period, subject to product deliveries and other conditions.

In March, Hoku amended an agreement with a unit of Solarfun Power Holdings Co SOLF.O, which had said it would delay prepayments to Hoku's unit for the supply and shipment of polysilicon.

Hoku said it will also delay shipments of polysilicon to Wealthy Rise by three months to June 30, 2010, and change the dates for price adjustments and termination rights in case of a delay in commencing shipments.

Hoku also said all of its customers are now current with their prepayments and it is in discussions with other potential customers for the possible resale of recaptured polysilicon capacity.

Shares of the Pocatello, Idaho-based company closed at $2.64 Thursday on Nasdaq.

For the alerts, double-click. [ID:nWNAB2682] (Reporting by Shradhha Sharma in Bangalore; Editing by Vinu Pilakkott)