LEDs – The Future Luminaire for the Mankind

What are LEDs ?

LEDs are semiconductor devices. Like transistors, and other diodes, LEDs are made out of silicon. What makes an LED give off light are the small amounts of chemical impurities that are added to the silicon, such as gallium, arsenide, indium, and nitride.

When current passes through the LED, it emits photons as a by-product. Normal light bulbs produce light by heating a metal filament until its white hot. Because LEDs produces photons directly and not via heat, they are far more efficient compare to incandescent bulbs.

Not long ago LEDs were only bright enough to be used as indicators on dashboards or electronic equipment. But recent advances have made LEDs bright enough to rival traditional lighting technologies. Modern LEDs can replace incandescent bulbs in almost any application.

LED light bulbs give off directional light, so the light goes where you aim it. LED bulbs are closer to the color of daylight — which new studies suggest is good for staying alert. Our LED light bulbs can be used to replace your standard fluorescent or halogen light bulbs. The bright, white LED light produced by our LED Light Bulbs works especially well for task lighting and reading light. LEDs not only produce light more efficiently, they also have a tiny mirror that reflects light in one direction. A more directed light means less wasted light.

The best way to start using our long life LED light bulbs is to try one first. Swap out a regular bulb on your porch, in a ceiling can, task or accent light, or maybe replace a bulb that you leave on at night. To get familiar with LED light bulbs, we recommend you experiment with different lighting combinations and see how their reduced light output works for you. Our LED bulbs have Edison style bases and will fit your existing lamps and fixtures. With LED light bulbs and just a bit of planning you can create a more interesting lighting environment while cutting down on your electric bill.

LED Circuits

To build LED circuits, it helps to be familiar with Ohm’s law, and the concepts of voltage, resistance and current.

LEDs do not have resistance like a resistor does. LEDs have a dynamic resistance that is their resistance changes depending on how much current passes through them. But it’s easiest to think of them as having NO resistance. This means that if you just connect an LED to a battery, you will have a short circuit. You would probably ruin your LED.

So an LED circuit needs some resistance in it, so that it is not a short circuit. Actually we need a very specific amount of resistance. Among we need a very specific amount of resistance. Among the specifications for LEDs, a “maximum forward current” rating is usually given. This is the most current that can pass through the LED without damaging it, and also the current at which the LED will produce the most light. A specific value of resistor is needed to obtain this exact current.

There is one more complication. LEDs consume a certain voltage. This is known as the “forward voltage drop”, and is usually given with the specs for that LED. This must be taken into account when calculating the correct value of resistor to use.

Zero Watt Bulbs

Zero watts are not a zero watt bulb. It consumes 15 watt power. We can manufacture and alternate bulb which consumes only 2 watt hence 13 watt can be saved. 3.2 crore population consumes 8 lakh bulb per year as Anert, a Govt Nodal Agency monitoring Renewable Energy activities in Kerala. If we calculate saving a very small segment the result will be:

8 Lakh x 13 watt x 24 Hrs x 365 days = 9.11 MW.

This can be saved if Govt create awareness among the people to use 2 watt LED bulb instead of 15 watt so called zero watt bulb.So we can understand that the Luminairs, appliances used in houses, offices, and factories are consuming lot of Energy.

Energy Saved = Energy Produced

If our state saves 9.11 MW from zero watt bulbs, then the Govt can save its production cost too. For 1 MW power, we have to invest approx 6 crore rupees to set up hydro, thermal, diesel power stations. Nuclear is three times costlier. It means 9.11 MW x 6 crore is approx 54 crore. To make such savings, our Govt must have a policy for Energy Conservation. As a matter of fact 40% of our India ’s population is without Power. Whatever energy saved can be diverted to rural India for lighting up our villages. If Energy Conservation is becoming mandatory, the entire nation will get sufficient power from our existing power plants.

We have a tradition of keeping light for 24 hours in pooja rooms and other important places. As per our calculation, if Kerala’s 3.2 crore people using 8 Lakhs bulbs then zero bulb consumption in whole India may be crores of bulbs. Its power consumption and heat emissions will be huge. So this sort of Energy Conservation Policy can prevent heat as well as unwanted carbon emission from power plants in our country.

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