SAO PAULO, April 12 (Reuters) - Brazil's Light

has signed a preliminary debt agreement with some

asset management firms that are creditors of the utility.

Light, which operate Rio de Janeiro's power service and has

been in a bankruptcy process since last year, did not unveil

financial details of the deal in a securities filing released

late on Thursday.

The agreement was reached with asset managers owning local

debt securities from eight different issuances by Light

subsidiary Light Sesa worth about 5 billion reais ($982.5

million), according to the filing.

($1 = 5.0891 reais)