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Apakah Anda termasuk yang bingung untuk memilih jenis bohlam lampu apa yang tepat untuk jenis aplikasi penggunaan pada ruangan Anda? Jika “Ya”  Anda tidak usah bingung dan sampai harus memanggil konsultan design interior segala kalau hanya sekedar untuk menentukan lampu apa yang cocok buat ruangan Anda. Kalau Anda pernah membaca tulisan saya terdahulu, Baca Tips Design Pencahayaan Lighting Ruang, sedikit pernah saya ulas kalau hakekat design pencahayaan lighting sebuah ruang sebenarnya adalah menganut kaidah siang dan malam.

Untuk dapat memilih lampu yang tepat atau sesuai dengan jenis aplikasi penggunaan pada ruangan Anda, Anda juga perlu melihat beberapa parameter serta jenis yang ada dalam spesifikasi lampunya. Berikut adalah beberapa parameter dan jenis yang ada dalam spesifikasi lampu, yang perlu Anda lihat karena berkaitan erat dengan aplikasi penggunannya:

1. Colour Rendering

Dalam katalog jenis lampu, satuan yang dipakai untuk dapat membedakan warna cahaya lighting atau biasa disebut Colour Rendering adalah Kelvin atau sering disingkat K. Semakin tinggi angka satuan Kelvin-nya, biasanya satuannya dalam ribuan, maka akan semakin putih kebiru-biruan warna cahaya lightingnya. Begitupun sebaliknya, semakin rendah angka Kelvin-nya maka akan semakin kuning kemerah-merahan warna cahaya lampunya. Untuk dapat menentukan warna apa yang tepat buat ruangan Anda maka jika ruangan Anda aplikasinya untuk bersantai, untuk kamar tidur, tempat makan, ruang keluarga, sebaiknya pilih yang warna cahayanya yang kuning. Jangan menggunakan warna putih. Karena apa? Karena warna kuning lebih soft, nyaman untuk nuansa santai dan beristirahat. Sebaliknya, jika aplikasinya buat ruang kerja yang bernuansa serius, pilihlah yang berwarna putih.

Pertanyaan saya bagaimana jika sebuah ruangan misalnya berfungsi ganda? Ya, berfungsi sebagai ruang santai juga ruang untuk bekerja Anda misalnya. Gampang, aturlah sistem pencahayaan ruangan tersebut menjadi dua grup, satu grup lampu dengan cahaya kuning dan satu grup lagi dengan cahaya putih lalu pasanglah saklar seri menjadi dua grup.

Sekedar contoh pada lampu yang ada di pasaran. Saya ambil contoh pada lampu Philips jenis esential type warm white (kuning) satuan Kelvin-nya sebesar 2700 K. Dan kalau type cool daylight (putih) satuan Kelvin-nya sebesar 6500 K.

2. Lumen

Satuan yang telah membedakan kekuatan cahaya bohlam lampu adalah Lumen. Semakin tinggi satuan Lumen sebuah lampu maka semakin terang atau tinggi pula Lux cahaya yang dipancarkannya. Lampu yang baik idealnya adalah ratio lumennya tinggi diatas 50 lm/W. Bahkan kini lampu-lampu Hemat Energi di pasaran sudah ada yang lumen per wattnya cukup tinggi, yaitu 60 lm/W. Untuk dapat menentukan berapa Lux yang tepat buat ruangan Anda maka jika ruangan Anda aplikasinya untuk bersantai, untuk kamar tidur, tempat makan, ruang keluarga, sebaiknya pilih yang watt dan lumen-nya tidak terlalu tinggi. Jangan menggunakan lampu yang terlalu terang pada ruangan tersebut. Karena apa? Karena cahaya yang lebih redup, soft atau tidak terlalu terang lebih nyaman untuk nuansa santai dan beristirahat. Sebaliknya, jika aplikasinya buat ruang kerja yang bernuansa serius, pilihlah yang watt dan lumennya yang tinggi.

Sebagai gambaran misalnya ruangan Anda berukuran 9 M2 dan berfungsi sebagai kamar tidur, kebutuhan lampunya sekitar 300 Lumen sudah cukup untuk dapat menerangi ruangan Anda.

3. Jenis Ballast dan Trafo

Di pasaran pada lampu tertentu, seperti jenis TL, PLC, Metal Halide dan spot ada yang masih menggunakan ballast dan trafo sebagai komponen lampunya. Dan tipe ballast dan trafo yang ada terbagi menjadi dua, konvensional (pakai kumparan/lilitan) dan elektronik. Dari kedua tipe ballast dan trafo tersebut, pilihlah yang dari jenis elektronik, jangan menggunakan yang jenis kumparan. Selain karena alasan Hemat Energi sebab ballast atau trafo elektronik terbukti lebih hemat energi, juga pada lampu yang ber-ballast atau trafo elektronik bentuknya lebih ramping sehingga tidak mengganggu estetika ruangan Anda.

4. Lampu Spot

Untuk obyek tertentu yang telah membutuhkan fokus penerangan seperti poster, lukisan atau obyek-obyek tertentu seperti patung, air mancur, atau pohon dan relief di taman misalnya, yang butuh sekali ditonjolkan, pasanglah lampu sorot yang mengarah ke obyek-obyek tersebut agar obyeknya nampak lebih menonjol dan hidup. Lampu seperti jenis ini dalam istilah design lighting disebut lampu spot. Untuk memilih lampu yang jenis seperti ini, pilihlah lampu yang berjenis PAR.

5. Lampu General Lighting

Untuk tipe general lightingnya, pilihlah yang jenis armaturenya dari downlight karena lebih fleksibel, yang titiknya bisa diatur menyebar mengikuti luas ceiling ruangan. Karena bentuknya yang tidak terlalu besar dan bisa inbow (masuk) ke dalam plafond membuat ruangan lebih indah secara estetika untuk mendukung design interior ruangan Anda.

6. Lampu Indirect Lighting

Untuk sistem pencahayaan ruang yang telah membutuhkan penerangan cahaya secara tidak langsung atau indirect, misal untuk koef ceiling (lekukan plafond) atau pada ornamen pada dinding, pilihlah lampu yang dari jenis TL karena bisa memberikan efek pencahayaan bayangan yang bagus. Lampu TL yang bentuknya memanjang lebih menghemat jumlah titik lampunya. Dan sekarang tersedia pilihan dengan bentuknya yang semakin kecil dan memanjang mirip dengan tubing neon sign yang dulu pada design interior lighting ruangan pernah dipakai juga sebagai lampu indirect lighting. Contoh lampu TL yang kecil seperti ini, pilih jenis lampu TL 5.

Demikian beberapa tips dari saya untuk memilih bohlam lampu yang tepat buat ruangan Anda. Semoga sharing tips ini bisa bermanfaat.

6 TIPS MEMILIH BOHLAM LAMPU

HOBART, Tasmania — Few places seem out of reach for China’s leader, Xi Jinping, who has traveled from European capitals to obscure Pacific and Caribbean islands in pursuit of his nation’s strategic interests.

So perhaps it was not surprising when he turned up last fall in this city on the edge of the Southern Ocean to put down a long-distance marker in another faraway region, Antarctica, 2,000 miles south of this Australian port.

Standing on the deck of an icebreaker that ferries Chinese scientists from this last stop before the frozen continent, Mr. Xi pledged that China would continue to expand in one of the few places on earth that remain unexploited by humans.

He signed a five-year accord with the Australian government that allows Chinese vessels and, in the future, aircraft to resupply for fuel and food before heading south. That will help secure easier access to a region that is believed to have vast oil and mineral resources; huge quantities of high-protein sea life; and for times of possible future dire need, fresh water contained in icebergs.

It was not until 1985, about seven decades after Robert Scott and Roald Amundsen raced to the South Pole, that a team representing Beijing hoisted the Chinese flag over the nation’s first Antarctic research base, the Great Wall Station on King George Island.

But now China seems determined to catch up. As it has bolstered spending on Antarctic research, and as the early explorers, especially the United States and Australia, confront stagnant budgets, there is growing concern about its intentions.

China’s operations on the continent — it opened its fourth research station last year, chose a site for a fifth, and is investing in a second icebreaker and new ice-capable planes and helicopters — are already the fastest growing of the 52 signatories to the Antarctic Treaty. That gentlemen’s agreement reached in 1959 bans military activity on the continent and aims to preserve it as one of the world’s last wildernesses; a related pact prohibits mining.

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But Mr. Xi’s visit was another sign that China is positioning itself to take advantage of the continent’s resource potential when the treaty expires in 2048 — or in the event that it is ripped up before, Chinese and Australian experts say.

“So far, our research is natural-science based, but we know there is more and more concern about resource security,” said Yang Huigen, director general of the Polar Research Institute of China, who accompanied Mr. Xi last November on his visit to Hobart and stood with him on the icebreaker, Xue Long, or Snow Dragon.

With that in mind, the polar institute recently opened a new division devoted to the study of resources, law, geopolitics and governance in Antarctica and the Arctic, Mr. Yang said.

Australia, a strategic ally of the United States that has strong economic relations with China, is watching China’s buildup in the Antarctic with a mix of gratitude — China’s presence offers support for Australia’s Antarctic science program, which is short of cash — and wariness.

“We should have no illusions about the deeper agenda — one that has not even been agreed to by Chinese scientists but is driven by Xi, and most likely his successors,” said Peter Jennings, executive director of the Australian Strategic Policy Institute and a former senior official in the Australian Department of Defense.

“This is part of a broader pattern of a mercantilist approach all around the world,” Mr. Jennings added. “A big driver of Chinese policy is to secure long-term energy supply and food supply.”

That approach was evident last month when a large Chinese agriculture enterprise announced an expansion of its fishing operations around Antarctica to catch more krill — small, protein-rich crustaceans that are abundant in Antarctic waters.

“The Antarctic is a treasure house for all human beings, and China should go there and share,” Liu Shenli, the chairman of the China National Agricultural Development Group, told China Daily, a state-owned newspaper. China would aim to fish up to two million tons of krill a year, he said, a substantial increase from what it currently harvests.

Because sovereignty over Antarctica is unclear, nations have sought to strengthen their claims over the ice-covered land by building research bases and naming geographic features. China’s fifth station will put it within reach of the six American facilities, and ahead of Australia’s three.

Chinese mappers have also given Chinese names to more than 300 sites, compared with the thousands of locations on the continent with English names.

In the unspoken competition for Antarctica’s future, scientific achievement can also translate into influence. Chinese scientists are driving to be the first to drill and recover an ice core containing tiny air bubbles that provide a record of climate change stretching as far back as 1.5 million years. It is an expensive and delicate effort at which others, including the European Union and Australia, have failed.

In a breakthrough a decade ago, European scientists extracted an ice core nearly two miles long that revealed 800,000 years of climate history. But finding an ice core going back further would allow scientists to examine a change in the earth’s climate cycles believed to have occurred 900,000 to 1.2 million years ago.

China is betting it has found the best location to drill, at an area called Dome A, or Dome Argus, the highest point on the East Antarctic Ice Sheet. Though it is considered one of the coldest places on the planet, with temperatures of 130 degrees below zero Fahrenheit, a Chinese expedition explored the area in 2005 and established a research station in 2009.

“The international community has drilled in lots of places, but no luck so far,” said Xiao Cunde, a member of the first party to reach the site and the deputy director of the Institute for Climate Change at the Chinese Academy of Meteorological Sciences. “We think at Dome A we will have a straight shot at the one-million-year ice core.”

Mr. Xiao said China had already begun drilling and hoped to find what scientists are looking for in four to five years.

To support its Antarctic aspirations, China is building a sophisticated $300 million icebreaker that is expected to be ready in a few years, said Xia Limin, deputy director of the Chinese Arctic and Antarctic Administration in Beijing. It has also bought a high-tech fixed-wing aircraft, outfitted in the United States, for taking sensitive scientific soundings from the ice.

China has chosen the site for its fifth research station at Inexpressible Island, named by a group of British explorers who were stranded at the desolate site in 1912 and survived the winter by excavating a small ice cave.

Mr. Xia said the inhospitable spot was ideal because China did not have a presence in that part of Antarctica, and because the rocky site did not have much snow, making it relatively cheap to build there.

Anne-Marie Brady, a professor of political science at the University of Canterbury in New Zealand and the author of a soon-to-be-released book, “China as a Polar Great Power,” said Chinese scientists also believed they had a good chance of finding mineral and energy resources near the site.

“China is playing a long game in Antarctica and keeping other states guessing about its true intentions and interests are part of its poker hand,” she said. But she noted that China’s interest in finding minerals was presented “loud and clear to domestic audiences” as the main reason it was investing in Antarctica.

Because commercial drilling is banned, estimates of energy and mineral resources in Antarctica rely on remote sensing data and comparisons with similar geological environments elsewhere, said Millard F. Coffin, executive director of the Institute for Marine and Antarctic Studies in Hobart.

But the difficulty of extraction in such severe conditions and uncertainty about future commodity prices make it unlikely that China or any country would defy the ban on mining anytime soon.

Tourism, however, is already booming. Travelers from China are still a relatively small contingent in the Antarctic compared with the more than 13,000 Americans who visited in 2013, and as yet there are no licensed Chinese tour operators.

But that is about to change, said Anthony Bergin, deputy director of the Australian Strategic Policy Institute. “I understand very soon there will be Chinese tourists on Chinese vessels with all-Chinese crew in the Antarctic,” he said.

 

Top News China’s Intents Are Questioned as It Builds in Antarctica

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