cuisine-spirit.com
iksogAvatar de iksog63 billets | Profil Recherche Google

ce blog tous
Derniers billets Connexion
Archives

mylife

27/08/2012

LEDs as compared

There are however three important points to bear in mind about the higher price for low energy LEDs as compared to incandescent and energy saving CFL light bulbs.

First, the price difference reflects the fact that the use of LED for general purpose domestic lighting is still quite novel,dab5d56ck though increasing manufacturing levels and consumer take-up will drive the price down dramatically once both come fully on stream over the coming months.

Second, and partially related to the observation above, is that the cost of LEDs drops by a factor of twenty over the course of each decade. This characteristic is reliably predicted by Haitz's Law (very similar to Moore's Law for computer chips and for similar reasons, principally because LEDs are, just like computer chips, pure electronic devices). Haitz also states that LED performance (amount of light per watt of electricity) increases tenfold over the same decade.

Third and perhaps most intriguing is the fact that as far as the cost of domestic lighting is concerned, the price of light bulbs is almost entirely irrelevant. It is an extraordinary yet easily provable fact that even if regular light bulbs were totally free and LED lights cost,let's say something outrageous like $80 each, it would still be vastly more economical to purchase LED low energy lights.
The reason for this is simple: the cost of electrical lighting is the cost of the energy i.e. electricity. It matters not one jot what the actual light bulbs cost; it's what it costs to run them that really counts. Also, since LEDs last for tens of thousands of hours (in practice, decades of use) you only need to pay the purchase price once, unlike regular bulbs which last only upto two thousand hours or just over one year.

The second biggest gripe about low energy LED lighting is light levels and quality, or in technical parlance luminosity and light color.

The concern about luminosity stems largely from historical notions of LED lighting applications such as LED Christmas lights and pocket torches which are clearly not capable of providing anything close to useable domestic lighting. However, you could right now purchase one of the latest Sharp Zenigata LED series of light bulbs which is rated at 80 lumens per watt (measure of luminosity).