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Lighting the Ambiance: Role of LED Lights

Updated on August 13, 2019
hmkrishna profile image

Halemane Muralikrishna is working as Chief Technical Officer (Tech. Inf.) at ICAR-CPCRI and is associated with the popularization of science

Lights have a long history

I still remember my childhood, at that time my parents used to carry the torch when they went to the field at night. It was the 1970's, at that time there was no electricity in our house. It is in 1977 that the electricity supply started in our village. At that time the torch was a very valuable asset in a house. Not only for my parents, but also to most of the people in the village, who were using a 5 battery torch which was almost one and a half foot long. They used to carry it in a customized bag with a long shoulder strap. It was to ensure that it will not slip off from the hands at night when they move around the field.
Other than this, we had only kerosene lanterns, which were popularly nicknamed as "chimney" and the kerosene oil put to light it was popularly called "chimney oil". It would light only one to two meters around it and there was an anecdote - "bottom of the lamp is always dark" as it had a
wick at the top, with its fuel container mounted on a stand. Thus, the bottom area was always dark. This anecdote was used to similize some of the dull kids of a wise-man.

Later on, when in the 1980's the emergency lamp has come into the household use. Though it was very heavy due to the acid contained lead-acid battery inside, it was chargeable and portable. It was very useful for the children to read and carry it on to the fields during the night walk. There were twin tubes of fluorescent type in those emergency lamps. About the 20 years ago our state was suffering from a severe power supply shortage in the summer.
It was a time when the incandescent lamps and fluorescent tubes used to illuminate even the boundary walls. The craze was very much prominent in the roadside households.
The entire country was struggling to manage the power management issue. Kerala had some hydroelectric power generators. There were thermal power stations in Tamil Nadu and Karnataka, but still, we were sometimes dependant on electricity from Andhra Pradesh power grid. Around 30-40% of electricity was consumed for household lightings alone, at that time.

An LED torch

A normal pocket torch
A normal pocket torch

Portable lighting

Now, two things have revolutionized portable lighting. First is low power consumption, high illumination LED lights. The second is the lithium-ion polymer, slim and lightweight batteries.

Light weight lights

LED lights and Lithium-polymer batteries together have brought in the portability of lights practically true and very much effective. Now, LED has entered almost every illumination sector from handheld, household, outdoor, playground, disaster management sights, showcases, panels, automobiles, railway engines, airplanes, underwater illumination including fountains, mobile phones, camera flashes and floodlights, insect traps, TVs, wild animal deterrents, etc. Now even portable lighting towers have come in the market.
Unlike incandescent light bulbs, which were rated in Watts indicating power consumption, LED lights are measured in terms of luminosity of light in lumens.
Overall, now LEDs are available to suit every occasion where illumination is required. Solar photovoltaic panels and LEDs have made the burden lessened for the electricity departments of the states and proved that the world cannot be blacked-out due to lack of functioning of the power grid.

Use of latest technology

Nanotechnology-based LED lights are more energy-efficient, durable and low-priced products.

Optimum light

  • A wall illumination, a decorative lamp or light on the corridor paths may need lesser luminosity.
  • A reading bulb must have at least 350 lumens - up to 600 lumens.
  • A torchlight may need 700 to 1500 lumens.
  • A video light or a floodlight may need 1600 to 2400 lumens.
  • A searchlight may need a combinatin of such LEDs.
  • Now brightest searchlight comes with 1000 Watts LED light set with 60000 lumen intensity, which can reach 1.15 kms distance.

Lights for every occasions

LED indicator light
LED indicator light
LED flash light of a mobile phone
LED flash light of a mobile phone
LED backlit LCD monitor
LED backlit LCD monitor

LED light and eye safety

LED lights are safe on the eyes as they emit pure white light of around 450nm range. It does not have blue or UV light, which is harmful to the eyes. For a reading light luminosity of 450 to 600 lumens is recommended. A low-intensity light and too bright a light will diminish eyesight.
So, a good LED light would not only have a worthwhile long life but also give a good productive life.

Comments

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    • hmkrishna profile imageAUTHOR

      Halemane Muralikrishna 

      36 hours ago from Murali Sadan, Ichlampady PO, Kasaragod, India - 671321

      Thank you very much for your good words of encouragement.

    • ChitrangadaSharan profile image

      Chitrangada Sharan 

      2 days ago from New Delhi, India

      Nice and informative article about Led lights. It’s widely used nowadays and has the benefits, you have mentioned above.

      I liked your opening paragraphs and it reminded me of the earlier times, which we have seen and may I say, enjoyed too. Life was simple then and we were happy with whatever sources of light, we had. Nowadays, the more we get, the more we expect.

      Thanks for sharing this engaging article. Wish you all the best in your writing endeavours.

    • hmkrishna profile imageAUTHOR

      Halemane Muralikrishna 

      3 days ago from Murali Sadan, Ichlampady PO, Kasaragod, India - 671321

      The emerging issue is on visual safety of the eyes of a regular user. Since LED lights do not have blue or UV light emission, they as such are not harmful to the retina. But, in a LED-backlit monitor, if blue colour is there, how will be the effect level, is the aspect which has to be understood. I will update on this topic soon.

    • profile image

      Shashank 

      3 days ago

      Further to Naveen's question on safety of LED light in room, what would be the suggestion for now, given that more scientific observation has to be done. Getting used to it now. But initially by look I had fear about its regular use. Any opinion on this? Good article and good topic to debate.

    • hmkrishna profile imageAUTHOR

      Halemane Muralikrishna 

      4 days ago from Murali Sadan, Ichlampady PO, Kasaragod, India - 671321

      We have to make scientific observations in this case.

    • hmkrishna profile imageAUTHOR

      Halemane Muralikrishna 

      4 days ago from Murali Sadan, Ichlampady PO, Kasaragod, India - 671321

      Thank you, Mr. Naveena Krishna

    • profile image

      Naveen 

      4 days ago

      Led light will not distribute across ...it will emit in single direcrion...becausr of this Is LED light not good for room lightning is it true?

    • profile image

      Naveena Krishna 

      5 days ago

      A very good article on light.It proves light is not lite...

    • hmkrishna profile imageAUTHOR

      Halemane Muralikrishna 

      5 days ago from Murali Sadan, Ichlampady PO, Kasaragod, India - 671321

      Thanks for the comments

    • Larry Slawson profile image

      Larry Slawson 

      5 days ago from North Carolina

      Never knew all this about LED lights. Thank you for sharing!

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