LIGHT S.A.

Corporate Taxpayer's ID (CNPJ/MF) 03.378.521/0001-75

Company Registry (NIRE) 33.3.0026316-1Publicly-held company

MATERIAL FACT

Light S.A. ('Company' or 'Light'), in compliance with the Brazilian Securities and Exchange Commission ('CVM') Rule 358, of January 3, 2002, hereby announces to its shareholders and the market in general that the Board of Directors of its wholly-owned subsidiary Light EnergiaS.A. ('Light Energia') approved, on this date, the Securities Purchase Agreement ('Agreement'), to be signed on a date yet to be announced, between Light Energiaand SunEdison, INC. ('SunEdison'), which establishes the terms and conditions for the sale of the 50,561,797 (fifty million, five hundred and sixty-one thousand, seven hundred and ninety-seven) common shares ('Shares') currently held by Light Energiain RenovaEnergiaS.A. ('Renova'), as follows ('Transaction'):

1. PriceandFormofSale

In accordance to the Agreement, the Shares' sale price, which currently corresponds to 15.87% of Renova'stotal capital stock, will be of USD 250,000,000.00 (two hundred and fifty million Dollars).

The payment will be performed once the Transaction is concluded through the delivery of new shares issued by SunEdison, traded in the New York Stock Exchange (under the ticker SUNE). Light Energiaclarifies that it is evaluating some instruments available to monetize, in Reais, the amount of shares received, mitigating share price volatility and currency exchange risks.

2. PrecedingConditions

The fulfillment of the Transaction, which is not guaranteed to occur, is subject to a series of preceding conditions, such as: regulatory approval by the Brazilian Electricity Regulatory Agency ('Aneel'), and waiver of the restrictions regarding the transfer of shares, as described below.

3. Restrictions regarding the transfer of shares

Renova'sShareholders' Agreement between RR Participações S.A. ('RR'), CemigGeração e Transmissão('CemigGT') and Light Energia, entered into on December 19, 2014 ('Renova'sAgreement') envisages, among other subjects: (i) prohibition to transfer Renova'sshares for a period of 4 (four) years from the agreement date ('Lock-Up'), and (ii) preference and tag along rights for the remaining signatory shareholders in the event of transferring Renova'sshares to third parties.

In Addition, Renova'sShareholders' Agreement, entered into between Light Energia, RR and BNDES Participações S.A. ('BNDESPAR'), Light S.A., Ricardo Lopes Delneri, Renato do Amaral Figueiredo and the Company in November 06, 2012 ('Renova- BNDESPAR Agreement'), and joined by CemigGT in September 29, 2014, establishes that, in case any of Renova'scontrolling shareholders intends to transfer bound shares, BNDESPAR shall have the right, at its exclusive criteria, to transfer the totality of its Units (two preferred shares plus one commomshare). to the acquirer, in the same transaction and under the same conditions.

Therefore, the aforementioned 'Preceding Conditions' will only be met after all the parties involved in both Renova'sShareholders' Agreements have expressed their positions.

4. HistoryandMotivation

In August 2011, Light Energiaacquired Renova'sshares for the amount of R$ 360,000,000.00 (three hundred and sixty million) or R$ 21.36 (twenty one reaisand thirty six cents) per Unit

After a cycle of investment valorization, the proposed Transaction is aligned with the strategy of strengthening working capital and developing other projects in Light Energia'sportfolio.

The Company will keep the Market informed regarding any relevant progress in this Transaction, which will be immediately disclosed, in compliance with CVM Rule 358/02 and the Corporate Law.

Rio de Janeiro, July 2, 2015.

João Batista Zolini Carneiro

Chief Business Development and IR Officer

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