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Thursday, February 13, 2014

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Philips sells a range of energy-enhancing lights, including the goLITE BLU, a panel of blue LEDs. 

Lights are no longer just for lighting.
With the development of LED lamp technology, the lowly light bulb is doing more than turning on and off. A lamp can be the centerpiece of an environment meant to improve health, moods and even food.
LEDs can create light in multiple colors, generate less heat and use a fraction of the energy of older types of bulbs. And LEDs can be controlled remotely from a PC or smartphone app, as programmable as a television.
“There’s a tremendous potential for LED lighting to go beyond illumination,” said John Strainic, General Electric’s general manager for consumer lighting. “We’re asking people to think about lighting as more than just an impulse purchase.”
Because of the LED manufacturing process, the light that the technology creates is weighted toward the blue end of the spectrum. That is true whether the LED is used in a light bulb, a tablet or a television display.
That blue light has its advantages: Blue stimulates a photoreceptor in the eye that reduces melatonin production and helps a person stay awake.
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Tabu’s Lumen TL800 lamp uses Bluetooth connectivity to control the lamp from a smartphone, allowing the user to change colors, dim the bulb and synchronize lighting effects to the rhythm of a song played on the phone. 
“You have to start thinking of light as a drug,” said Terry K. McGowan, the director of engineering for the American Lighting Association, a trade group.
That is why Lighting Science, an LED manufacturer, is now selling Awake and Alert, an LED lamp that keeps people pumped up by pumping up the blue. Conversely, the company’s Good Night lighting product reduces the blue output, helping people sleep. This summer, Lighting Science will offer its Rhythm Downlight, a lamp controlled by a smartphone app that adjusts blue light based on a user’s sleep schedule.
“The Awake and Alert lamp does not look brighter, but our circadian system sees it as such,” said Robert Soler, Lighting Science’s director of lighting research. “We always felt that there was so much more you can do with light than just increase vision.”
Philips sells its own range of energy-enhancing lights, including its Wake-up Light and — to combat winter blues — the goLITE BLU, a panel of blue LEDs.
In Europe, Philips is experimenting with its HealWell system in hospitals. By changing colors based on time of day, it encourages a patient to wake up, feel more relaxed and sleep more easily. At a field study at the Maastricht University Medical Center in the Netherlands, cardiology patients were found to sleep longer and experience reduced depression.
In the United States, Lighting Science is working on a similar system, and expects to offer products by the end of this year. “Unfortunately, many hospitals have removed solariums, but lots of studies have shown that they improve recovery time,” said Mr. Soler of Lighting Science.
While the ability to alter an LED lamp’s color opens up new uses for light, the fact that LEDs can be remotely controlled significantly changes their potential.
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The Awake and Alert, an LED lamp from Lighting Science, pumps out blue light, which stimulates a photoreceptor in the eye that reduces melatonin production and helps a person stay awake. 
With Osram Sylvania’s ULTRA iQ system, users can program lamps to turn on when a key is put in the lock. Philips’s Hue system, on the other hand, allows users to create their own lighting moods and then send those instructions to special lamps via a smartphone app. The lights can also be programmed to respond to specific events, such as by glowing a prescribed color when it is time to remove the roast from the oven.
Tabu’s Lumen TL800 lamp uses Bluetooth connectivity to control the lamp from a smartphone, allowing the user to change colors, dim the bulb and synchronize lighting effects to the rhythm of a song played on the phone.
But synchronizing lighting to events is much more than a parlor trick. Philips has designed lighting systems that decrease growing times and increase yield for greenhouse vegetables and flowers, by using a light’s specific hues.
In the Netherlands and Canada, among other places, tomato and vegetable growers are using Philips’s LEDs to improve bulk, increase fruit growth and reduce vegetable maturation time while reducing energy costs.
“We find the optimal light recipe for the grower,” said Udo van Slooten, a Philips Lighting general manager for horticulture.
Within the next few years, the world’s major lighting companies expect to expand LEDs’ connected capabilities, particularly with sensors.
For example, sensors could tell how many people are in a room and their location, and direct the proper amount of lighting to where it is needed. Medical patients prone to agitation could be calmed once facial recognition technology identifies them and changes the hue of an examining room to more calming tones. When older people enter a room, lighting intensity can be raised to compensate for their decreased ability to see.

“Today, lighting is becoming an appliance, like a blender,” said Mr. McGowan of the American Lighting Association. “I tell people when they move, they should take their LED bulbs with them.”


Monday, February 3, 2014



रामहरि पौड्याल
भरतपुर १२/१९३, चितवन

सुन्दर शान्त र हराभरा प्रकृति,
मान्छेको बस्तीमा हाँसेको छ,
जगतका सामू नाचेको छ |
छाडेर आफ्ना मोहनी रङ्गहरु,
बाँडेर आफ्ना मृदु मुस्कानहरु |
प्रकृति सजिएकी छ धर्तीभरि
मौसम अनुकूल,
मौसम प्रतिकूल |
बसन्तमा हासिदिन्छे,
शरदमा सहिदिन्छे |
गृस्ममा सेतै फुलिदिन्छे,
हिमाच्छादित धर्ती बनेर |
सहनुको अर्को नाम धर्ती रहेछ,
सहनशीलताको अर्को नाम प्रकृति रहेछ |
आदिकालदेखि अनादीसम्म,
धैर्यशील क्षमाशील प्रकृति |
अपरम्पार छ, प्रकृतिको बरदान !
ऋषिमुनिहरूको तपोभूमि,
शिबभगवानको क्रिडा भूमि कैलाश,
जीव जन्तुहरुको घना जङ्गल ...
सबैसबैमा लोभी मान्छेले धावा बोल्यो,
हेरिरह्यो प्रकृतिले अहंकारी मान्छेको जीजिविषा |
सहिरह्यो प्रकृतिले निक्रिस्ट मान्छेका कर्तुतहरु ,
फाँडीए बनजंगल,
खनिए खोस्रिए पहाड पर्वतहरु,
खनिजहरुका नाममा,
तेल भण्डारणका नाममा |
दिन दुई गुणा रात चौगुणा,
प्रकृति रित्तीई रहेकी छ
प्रकृति सिद्धिरहेकी छ |

प्रवाह छैन अघोरी मान्छेहरुलाई
लुछिनु लुटिनुको सीमान्त  कहिले ?
प्रकृति हेरिरहेकी छ अघोरी हातहरुलाई
प्रकृति देखिरहेकी छ निर्लज्ज मनहरुलाई |
प्रकृति सहिरहेकी छ आफूमाथिको बलत्कार,
मात्र मेरो कवी मन हात जोडी रहेछ,
प्रकृति बिर्सेर कैलेई पनि प्रतिसोधको सुनामी नहान !
प्रकृति बिर्सेर कैलेई पनि प्रतिसोधको सेन्डी नफ्याँक !!

सम्प्रति: संयुक्त अधिराज्य बेलायत