Led 4 Life
Flat 1, 8 Parkfield Road, Bradford, West Yorkshire, BD8 7AB [ Map ]
Tel: Not Provided | Web: http://www.led4life.co.uk
Your Online LED Lighting Store.
SAVE MONEY, SAVE ENERGY, SAVE THE PLANET !!!
Technological advancement of the LED4LIFE products outstrips the customers’ expectations, this satisfying the highest market requirements. Development of the product line, taking advantage of the unique technical solutions from the very beginning, resulted in a very sophisticated design and high efficiency of the LED lighting.
The LED4LIFE offer is very wide and consists of several type series. All the products represent high quality standards and are made of the selected components only. The workmanship of the whole is perfect.
Range of the LED4LIFE products provides for unique functionality and excellent performance parameters, creating this way the new fields for innovative lighting designs. LED4LIFE makes now the look to the future possible.
Light Bulb Brightness and Illumination
The light that is perceived by the human eye is called the luminous flux. The measurement of that light is the lumen (lm). Simply put: lumens are the measure of the amount of light we see. This 'brightness' is now required to be listed on light bulb packaging. Lower numbers are duller and higher numbers are brighter.
When purchasing light bulbs the best measure to determine suitability is the lumen. Is is recommended that you determine the lumens required and pick the lightbulbs that require the fewest watts. Fewer watts means lower electricity bills. That is where LEDs really shine. LEDs have a lumen to watts rating that far surpass incandescent bulbs and even have better ratings that compact florescent bulbs (CFLs)! This means that an LED light will cost you less in electricity and still shine bright.
The brightness of a light is measured in lumens because the sensitivity of human eye differs according to the wavelength of the particular light source. Lumens is a measurement that takes the human factor into consideration.
Light Bulb Power Consumption: Wattage
Any light source consumes power. Light bulbs consume electricity measured in wattage. Lights have differing efficiency that results in varied levels of power consumption. Higher wattage does not always mean higher brightness.
Wattage of LEDs compared to incandescent light bulbs
LED bulbs can generate twice the brightness of light (Lumens) at a fifth the wattage. Yes, that is right, the brightness of a 30 watt incandescent can be doubled by a 6 watt LED light bulb. To match the brightness of the LED you would require a 15 watt compact florescent light bulb.
Why use LED lighting?
In the UK 22% of all electricity used is for lighting. The UK used in 2009 to 378.5 TWh (kilowatt-hour). LEDs use, on average, 5% of the electricity of an incandecent light bulb and do not have any of the mercury that compact florecent lightbulbs (CFLs) use. What this means is that if UK replaced all of its lighting with LEDs we would stand to reduce our energy consumption of electricity for lighting by 90% or more. Now that is green!
Trends and lifestyle demands are indicating that over the coming years LEDs will drastically change the energy consumption patterns of the world as well. Consequently, there is a phenomenal amount of resources being devoted to improving LED technology worldwide¦ This is really good for you the consumer and helps our planet too.
Benefits of LEDs
Extremely low power consumption (costs less to light)
Very efficacious-convert energy to light, not heat
Extremely long life span (50,000-100,000 hours)
Durable, insensitive to vibration
Dimmable and programmable, in many cases
Super-fast turn-on, unlike compact fluorescents
Lightweight and compact
Color, without the use of filters and lenses
No reflectors are required to direct the light
Very environmentally friendly and no mercury or other toxins
Recyclable
Applications
LEDs are already used as the best light source for traffic signals, vehicular tail lights, emergency lighting and flashlights.
We are providing LEDs for almost any home or commercial use. Increasingly, they are a desirable choice for use in accent, task, landscape, portable and even area lighting. LEDs let you do things you just cant do effectively with other lighting sources, especially due to LEDs low rate of power consumption. For example, imagine powering a string of lights ½ mile long from a single electrical socket. You can, with a commercial line of LED Christmas lights! With LEDs you can use more light than ever before and still save money. Additionally, they are so long lasting that you can use them in complicated design installations without worrying about frequent and costly bulb replacements. LEDs have been used to create the most innovative lighting for stage shows, restaurant and hotel interiors, building exteriors and bridges.
We hope this information has been useful for you and inspires you to use LEDs for all of your lighting needs!
CRI - Color Rendering Index
The Color Rendering Index (CRI) is the relative ability of a light source to replicate colors generated by a reference light source of the same color temperature. It is measured as a percentage.
What this means is that a CRI of 100%, taken at a color temperature of noon day sunlight (6000k) will exactly reproduce the colors found on a sunny day at noon.
A CRI of 50% taken at noon day sun will partially reproduce the colors when compared to that of a normal noon day.
Some marketers use differing color temperatures as a reference to attain 100% CRI, when the actual CMI would be much less than 100% if noon day sun light was used as a reference.
If you notice how a landscape changes color as the sun sets. This is a change in the color temperature. 100% CRI at sunset would result in a yellow or orange appearance. That same measure against noon day sun might only produce a CRI of 60% or less.
If this has not confused you try this wikipedia definition:
"The Color Rendering Index (CRI) (sometimes called Color Rendition Index), is a measure of the ability of a light source to reproduce the colors of various objects being lit by the source. It is a method devised by the International Commission on Illumination (CIE). The best possible rendition of colors is specified by a CRI of one hundred, while the very poorest rendition is specified by a CRI of zero. For a source like a low-pressure sodium vapor lamp, which is monochromatic, the CRI is nearly zero, but for a source like an incandescent light bulb, which emits essentially black body radiation, it is nearly one hundred. The CRI is measured by comparing the color rendering of the test source to that of a "perfect" source which is generally a black body radiator, except for sources with color temperatures above 5000K, in which case a simulated daylight (e.g. D65) is used. For example, a standard "cool white" fluorescent lamp will have a CRI near 63. Newer "triphosphor" fluorescent lamps often claim a CRI of 80 to 90.
CRI is a quantitatively measurable index, not a subjective one. A reference source, such as black body radiation, is defined as having a CRI of 100 (this is why incandescent lamps have that rating, as they are, in effect, almost blackbody radiators), and the test source with the same color temperature is compared against this. Both sources are used to illuminate eight standard samples. The perceived colors under the reference and test illumination (measured in the CIE 1931 color space) are compared using a standard formula, and averaged over the number of samples taken (usually eight) to get the final CRI. Because eight samples are usually used, manufacturers use the prefix "octo-" on their high-CRI lamps."
Hours of Business
24h / 7
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