OPERATING PREVIEW

Rio de Janeiro, July 20, 2015 - Light S.A. (BMF&BOVESPA: LIGT3) discloses a preview of operating information regarding the distribution, generation and commercialization/services segments for the second quarter of 2015 (2Q15).

1. Operating Highlights

OPERATING INDICATORS - DISTRIBUTION 2Q15 2Q14 Var. %



Nº of Consumers (thousand) 4,269 4,156 2.7% Nº of Employees 4,290 4,268 0.5% Average provision tariff - R$/MWh 608 423 43.9% Average provision tariff - R$/MWh (w/out taxes) 423 293 44.3% Average energy purchase cost¹ - R$/MWh 186 153 21.5% OPERATING INDICATORS - GENERATION 2Q15 2Q14 Var. %

Installed generation capacity (MW)* 990 961 3.0% Assured energy (MW)* 703 698 0.7% Pumping and internal losses (MW) 87 87 - Available energy (Average MW)* 616 611 0.8% Net Generation (GWh) 737 944 -22.0% Load Factor 62.6% 62.4% 0.3 p.p.

¹Does not i ncl ude purcha s e i n the s pot ma rket

* Incl udes proporti ona te s ha re of a s s oci a tes

2. Distribution Market

Electricity consumption (GWh)

Total market - Quarter


6,500

1,325

-0.8%

6,448

1,326

-1.0%

2,128

2,128

-4.6%

2,030

2,030

2,018

226

1,793

+2.8%

2,075

225

1,850

1,389

1,045

344

-1.3%

1,371

1,046

325

964

54

910

+0.8%

972

55

917

5,176

5,122

2Q14

2Q15

2Q14

2Q15

2Q14

2Q15

2Q14

2Q15

2Q14

2Q15

RESIDENTIAL

COMMERCIAL

INDUSTRIAL

OTHERS TOTAL

Free

Captive

OPERATING PREVIEW

Total energy consumption in Light SESA's concession area (captive clients + transport of free clients) in 2Q15 was of

6,448 GWh, a decrease of 0.8% in comparison to 2Q14, reflecting the fall in the residential (-4.6%) and industrial
(-1.3%) segments.

Electricity consumption (GWh)

Total market - Semester


13,874

2,582

0.0%

13,870

2,541

+0.3%

4,880

4,880

-0.9%

4,835

4,835

4,285

458

3,827

+3.3%

4,426

465

3,961

2,719

2,014

-3.3%

2,630

1,963

1,990

109

1,880

-0.6%

1,978

112

1,866

11,292

11,329

RESIDENTIAL

COMMERCIAL

INDUSTRIAL

OTHERS TOTAL

Free

Captive

Total energy consumption in Light SESA's concession area (captive clients + transport of free clients) in1H15 was of

13,870 GWh, in line with 1H14.

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OPERATING PREVIEW Energy Balance

DISTRIBUTION ENERGY BALANCE - GWh

Position: January - June 2015

PROINFA

Residential

255,1 4.835,4

ITAIPU (CCEE)

2.526,4

Own load

Light

Captive Billed Industrial

Energy 666,9

11.329,1

Commercial

AUCTIONS (CCEE)

Required E. (CCEE)

15.534,8 3.960,8

Energy

4.405,5 15.980,7 Balance¹ Others

4.205,7 1.865,9

NORTE FLU (CCEE)

3.150,1

OTHERS(*) (CCEE)

1.413,5

Basic netw. Losses 266,8

DIT Losses (**) 179,2

COTAS

3.788,1

ANGRA I & II

441,9

(*) Others = Purchase in Spot - Sale in Spot.

(**) Other transmission lines with less than 230 Kv

Note: 1) At Light S.A., there is intercompany power purchase/sale elimination.

2) Power purchase data as of 07/08/2015 (subject to change).

Energy Balance (GWh)

2Q15

2Q14

Var. %

1H15

1H14

Var. %

= Grid Load 8,623 8,797 -2.0% 19,356 19,741 -2.0%

- Energy transported to utilities 572 612 -6.5% 1,228 1,226 0.1%

- Energy transported to free customers 1,320 1,261 4.7% 2,593 2,545 1.9%

= Own Load 6,731 6,924 -2.8% 15,535 15,970 -2.7%

- Captive market consumption 5,122 5,176 -1.0% 11,329 11,292 0.3% Low Vol tage Market 3,399 3,471 -2.1% 7,711 7,701 0.1% Medi um Vol tage Market 1,723 1,704 1.1% 3,619 3,591 0.8%

= Energy Balance¹ 1,609 1,748 -8.0% 4,206 4,678 -10.1%

1 Energy Balance = own load - captive Market consumption

Losses = energy balance + variation in non-billed energy

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OPERATING PREVIEW Collection

COLLECTION RATE BY SEGMENT

Quarter

104.2% 103.5%

105.1%

104.5%

101.8% 102.9%

108.1%

97.8% 101.7% 99.4%

97.3%

80.3%

Total

Retail

Large Costumers

Public Sector

2Q13 2Q14 2Q15

COLLECTION RATE BY SEGMENT

Semester

102.5% 98.7%

94.0%

102.0% 98.4%

95.9%

103.4% 100.3%

97.5%

102.5%

96.3%

78.7%

Total

Retail

Large Costumers

Public Sector

1H13

1H14

1H15

The collection rate in 2Q15 reached 97.8% of billed consumption, 5.7 p.p. lower than 2Q14, mainly due to collection

rates in the Public Sector. In 1H15, collection rate was of 94.0% of billed consumption, 4.7 p.p. below 1H14.

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OPERATING PREVIEW Operating Quality

DEC e FEC - 12 MONTHS

-3.1%

14.08


13.65

7.12

-6.2%

6.68

DEC

jun-14

FEC

jun-15

In the last 12 months, the moving average of the equivalent length of interruption indicator (DEC), expressed in hours, registered 13.65 hours.

In the last 12 months, the moving average of the equivalent frequency of interruption indicator (FEC), expressed in occurrences, stood at 6.68 times.

3. Generation

LIGHT ENERGIA (GWh)

2Q15

2Q14

Var. %

1H15

1H14

Var. %

Free Contracting Environment Sales

1,041.8

1,113.0

-6.4%

2,184.3

2,244.1

-2.7%

Spot Sales (CCEE)

(173.7)

(17.6)

884.4%

(16.1)

116.9

-

Total

868.1

1,095.3

-20.7%

2,168.2

2,361.0

-8.2%

Light Energia sold 868.1 GWh in 2Q15, 20.7% lower than the 1,095.3 GWh sold in 2Q14. In 1H15, Light Energia sold

2,168.2 GWh, 8.2% below the 2,361.0 GWh sold in 1H14.

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OPERATING PREVIEW 4. Commercialization and Services

Volume of Energy Sold

(GWh)

2,651.5

-1.8%

2,602.9

1,313.5

-4.0%

1,261.0

2Q14

2Q15

1H14

1H15

In the second quarter of 2015, the volume of energy sold by Light Com and Light Esco totaled 1,261.0 GWh, 4.0%

below the 1,313.5 GWh sold in 2Q14. In 1H15, the sale of energy totaled 2,602.9 GWh, 1.8% below the 2,615.5
GWh sold in 1H14.

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OPERATING PREVIEW 5. Disclosure Program

Schedule

Teleconference

08/13/2015, Thursday, at 5:00 p.m. (Brasília Time) and at 4:00 p.m. (Eastern Time), with simultaneous translation to English
Access conditions:

Webcast: link on site www.light.com.br/ri (portuguese and english)

Conference Call - Dial number: Brazil: +55 (11) 2188 0155

USA: +1 (646) 843-6054
Other countries: +1 866 890 2584

Access code: Light

IR Team

Contact

e-mail

Phone

Mariana da Silva Rocha

mariana.rocha@light.com.br

+55 21 2211-2814

Bruna Dutra Alvarenga

bruna.alvarenga@light.com.br

+55 21 2211-2660

Leonardo Dias Wanderley

leonardo.wanderley@light.com.br

+55 21 2211-2828

Forward-looking statements

The operating information disclosed herein is a preview. Statements about future events are subject to risks and uncertainties. These statements are based on beliefs and assumptions of our Management, and on information currently available to the Company. Statements about future events include information about our intentions, beliefs or current expectations, as well as of the Company's Board of Directors and Officers. Exceptions related to statements and information about the future also include information about operating results, likely or presumed, as well as statements that are preceded by, followed by, or including words such as "believes", "might", "will", "continues", "expects", "estimates", "intends", "anticipates", or similar expressi ons. Statements and information about the future are not a guarantee of performance. They involve risks, uncertainties and assumptions because they refer to future events, thus depending on circumstances that might or might not occur. Future resul ts and creation of value to shareholders might significantly differ from the on es expressed or suggested by forward-looking

statements. Many of the factors that will determine these results and values are beyond LIGHT S.A.'s control or forecast capa city.

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