Catalog

LG Twin Tower, located in Yeoido, is the headquarter of LG Group that covers 14,733 m² of land
and 157,835 m² of gross floor space. The two buildings have 3 underground levels and 34 ground
levels with a seating capacity of over 10,000. Since the consturction in 1987, LG Twin Tower has
required no repair work. However, the equipment installed throughout the buildings had become
obsolete, while the maintenance costs and energy costs continued to grow. As a landmark of
Seoul, LG started to renovate the building in June 2010, in order to enhance LG brand image
and to improve the working conditions. Three main purposes of this renovation project were
to bring about greater eco-friendliness for greater energy savings, to create a modern working
environment and to provide a comfortable working space with new equipment. To achieve this,
it required a significant improvement of the lighting system which accounts for 30% of energy
consumption in large buildings. To provide an optimal environment, it must be environmentally
friendly and compatible with the existing facilities allowing integrated control system. These are
the reasons behind the selection of LG LED Lighting.
BACKGROUND
With fluorescent lights’ high energy consumption, there was always a big burden on overall energy costs.
Moreover, with the rising issue of energy cost regulation for big buildings, we needed a new solution.
Fluorescent lights are short-lived, while they also require higher maintenance costs, as around 400
fluorescent lights have to be changed daily. Due to replacement, labor and disposal costs, the fluorescent
light really was wasteful.” (Pan-Sik Choi, senior research engineer of Serveone) The biggest problem
before the renovation was the electricity cost of conventional lighting and the maintenance costs of
deteriorated equipment. With two buildings each having 34 floors, the total number of fluorescent
lights was over 50,000. Hundreds of fluorescent lights with a maximum life span of 8,000 hours need
to be changed every day. As the government’s regulation is becoming stricter, more effective energy
saving solutions were desperately needed. Lighting with minimum power consumption was needed, as
well as eco-friendliness and integrated control optimized for a high technology working environment.
CHALLENGE
The scale of the project was unprecedented, as it installed the country’s largest working space with LED
lighting and control. Therefore, we needed a brand equipped with better quality and solutions that went
beyond simple lighting service. “Perhaps replacing just lighting is not that difficult. But, the management
system for controlling them was vital.” (Min-Kwang Lee, senior research engineer of LGE) LG Electronics
suggested the following three key factors for Twin Tower’s renovation process.
EFFICIENCY : Effective energy saving technology
LG LED flat light, which replaced 80W conventional fluorescent lights, has a power consumption of
53W while bringing 20-30 percent in energy savings. In addition, with the daylight sensor and the
dimming function, up to 80 percent of energy savings are possible. Illumination reduced by 50 percent
can fully light up the working space, while the daylight sensor installed at each window can recognize
outdoor daylights automatically and transmit a signal to help maintain optimal indoor illumination.
Moreover, a lifespan of 50,000 hours can noticeably reduce the maintenance costs.
SOLUTION
COMFORT : Optimal light for users
Another benefit of LG LED flat light is low UGR with less than 19. UGR level below 19 is optimal
for the working space, providing workers with proper lighting for writing, reading and computer
work. Conventional fluorescent lights have UGR levels between 22-23, which can cause stress
for office workers who spend extensive time under the lights. Additionally, LG LED is eco-friendly
and brings long-term health benefits, as it does not emit mercury, lead, ultraviolet rays or infrared
rays.
RELIABILITY : Credibility and high quality
LG Twin Tower project has not only 17,000 LG LED flat lights (53W) replacing conventional
fluorescent lights, but also 3,000 LED downlights (15W) and 2,000 LED PAR30 (12W) replacing
conventional halogen lamps. Particularly, LED flat light is connected together with integrated
control systems, making them more credible.
“We tested the products on 7th and 33rd floors of the West Tower for two months. During
the installation, communication, electricity and cabling were few of the many variables to be
managed. So, we plan to have continuous testing and monitoring after the construction for
further improvement.” (Bong-Geun Jung, senior research engineer of LGE) LG LED Lighting
was recognized both internally and externally. American certification company, Underwriters
Laboratories(UL), designated LG Electronics R&D center as a UL-authorized testing lab in the
green energy sector (e.g. solar, LED lighting). This means LG LED lighting can secure high levels of
reliability.
“Having a total solution technology with the general
advantages of LED lighting is only possible with LG. Long
lifespan, energy efficiency and control solution combine to
save energy costs by up to KRW 10 million.” (Pan-Su Choi,
senior research engineer of Serveone) The most remarkable
achievement after the LG LED lighting installation was
energy savings. Twin Tower’s power consumption in January
greatly declined, recording 1,900,896kWh, reducing up to
310,000kWh compared to January 2010, which was before
the renovation. Assuming the average monthly power
consumption is 200kWh, Twin Tower’s energy consumption
is equivalent to 1,550 households each month.
Electricity cost was KRW 190 million, enabling savings of KRW 10 million, compared to 2010.
“The best part of moving into the renovated building was the lighting. Compared to the complicated
atmosphere with separated fluorescent lights and luminaires, I like the refined design that combines the
lighting and ceiling in one. It’s also not that glary as before. Each floor has controllable touch panels, so I
can turn them on, when I’m working overtime. Besides, I feel much relieved that it contains no pernicious
ingredients.” (Sang-Woo Lim, LG International)
This project proved the reliability and high energy efficiency of LG LED lighting products, as well as its
ability to provide an optimal environment for the users.
In short, LG LED lighting is expected to be widely recognized.
BENEFIT
The optimal lighting solution for
eco-friendly smart buildings, LG LED Lighting
CASE STUDY