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The nostalgic glow of LEDs shines at the Prague Castle, a World Heritage site (Part 1-3)ch.02

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Click on the image to watch the video. Length: 5 min 54 sec
The nostalgic glow of LED Clear Light Bulbs. [1 min 27 sec]

This documentary film comprised of 3 volumes will tell you the story of how the LED Clear Light Bulbs, which look exactly like incandescent light bulbs and emit a very nostalgic light, were developed. Prague Castle (Czech Republic) is the largest ancient castle in the world and a UNESCO World Heritage site. 10,000 light bulbs at this castle, which has maintained its appearance over the years, were replaced with Panasonic's LED bulbs. The type of Panasonic bulbs that were most used were the LED Clear Light Bulbs, which has a transparent glass shell and a LED substrate in the center that closely resembles filaments of incandescent light bulbs. Please take a look at this documentary, which introduces the story behind the development of this unique LED and scenes from the Prague Castle as old conventional light bulbs are replaced with the new.

Part 1 introduces the initial stages of development, from the idea of the developer that got everything started to the prototype. Part 2 describes how the person in charge of developing products for the European market saw the prototype and became very keen to introduce it to the European market. The LED Clear Light Bulb first introduced to the European market was named "Nostalgic Clear" after its familiar glow. Part 3 features scenes of the developer in Prague attending to the installation of light bulbs.

The nostalgic glow of LEDs shines at the Prague Castle, a World Heritage site (1/3)

Changing the lighting in the Prague Castle to LEDs [0 min 00 sec]

Prague is the capital of Czech Republic, and the Prague Castle located in this capital is one of the most prominent symbols of the nation. It welcomes millions of visitors each year. Almost all the light bulbs used to light this castle were incandescent light bulbs. Until now, these could not be replaced with more eco-conscious lighting because conventional bulb shaped fluorescent lamps and LED bulbs would have not been able to maintain the ambience of this historical architecture. But the newly-developed, energy-saving, long-lasting LED Clear Light Bulbs offering the same warm nostalgic glow has helped launch this project, through which 10,000 conventional light bulbs were replaced by LEDs.

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A wide angle shot of the Prague Castle, the world's largest castle and a World Heritage site. [0 min 03 sec]

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The Ball Game Hall where many kings of the past enjoyed playing ball games. [0 min 21 sec]

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The incandescent light bulbs in the Ball Game Hall were also replaced by LED light bulbs. [0 min 23 sec]

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LED Clear Light Bulbs look exactly like incandescent light bulbs. [0 min 32 sec]

Product development began somewhat accidently [2 min 39 sec]

Conventional LED light bulbs have many metal parts (see bottom left photo). The Development Project Leader Mr. Mori says, "There are a lot of people who want to continue to enjoy the ambience of incandescent lights." He is one of them, and so he began to make a prototype with left over scraps from the factory. When he saw the filament glow like an incandescent light bulb, he described that it was as though life had came into existence inside the bulb. The prototype was developed from one man's idea somewhat accidentally. But it caught the eye of the person in charge of product development for the European market.

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Conventional LED light bulbs. The light source was quite different from filaments, so they couldn't use a clear transparent glass bulb. [4 min 20 sec]

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The light bulb installed in the Prague Castle resembled incandescent light bulbs both in terms of shape and light quality. [1 min 01 sec]分01秒)

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Mr. Mori, the Project Leader of the light bulb's development. [4 min 29 sec]

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This first prototype created from scraps. This is where it all started. [5 min 14 sec]

The nostalgic glow of LEDs shines at the Prague Castle, a World Heritage site (2/3)

Creating an LED light bulb that looked and shone exactly like incandescent bulbs - this was a completely new undertaking for Panasonic. There were many obstacles that had to be overcome on the way. Part 2 introduces various challenges the developers faced, and the unique request from Ms. Muranaka, the person in charge of developing products for the European market. You can see just how dynamic developing a product can be.

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Ms. Muranaka knew instantly, that this product would do well overseas. [8 min 18 sec]

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There were obstacles they had to overcome. [4 min 13 sec]

The nostalgic glow of LEDs shines at the Prague Castle, a World Heritage site (3/3)

The new bulb created through much pain and effort was named "Nostalgic Clear." Part 3 introduces scenes of these new light bulbs being installed in various areas of the Prague Castle. The Project Leader, Mr. Mori for whom this product felt like his own child, also traveled to Prague to witness the critical moment.

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The moment when the LED Clear Light Bulbs were turned on. [8 min 48 sec]

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Mr. Alexis, who in charge of the lighting business, named the product, "Nostalgic Clear." [0 min 26 sec]