what to look for when buying led light bulbs

by:DGT Lighting     2020-05-27
If you haven\'t carefully considered the theme of lighting recently, it may be because, like most people, phasing out traditional incandescent lamps is not the most important thing in your mind.
It is not surprising;
It doesn\'t seem like a big deal to be able to turn on the lights at will.
We \'ve been doing this all the time and the lighting business is going well as priorities go on.
However, the demise of incandescent lamps continues calmly and relentlessly, and in less than a few years, the only product on the shelf will be a low-energy bulb, of which there are two kinds of CFLs (
Compact fluorescent lamp)and LEDs (
At present, most of the low-energy bulbs available are CFLs, which are about 4 times more efficient than incandescent lamps (i. e.
They only waste about 25% of their energy as heat compared to 90%).
However, CFLs are generally disliked by consumers, manufacturers and environmental activists.
Their aesthetic quality is very poor.
Not really want the lighting you want)
, They are difficult to dispose of safely due to their Mercury content;
And it\'s complicated and expensive to make.
On the other hand, the led scored well at all of these points, and on top of that, there was a lot, and most obviously the efficiency of the led was not only 10 times that of the incandescent lamp, but every 18 months or so, they will double their performance.
The meaning of this (
Known as Haitz\'s law)are astounding;
After 3 years, we will see LED bulbs with 40 times more efficiency.
It\'s no wonder the lighting industry has
Choose to abandon CFL development and focus on led.
So, should you buy LED bulbs now?
It depends to a large extent on whether you quote or not (
Compared to incandescent and CFL bulbs, the price of the led is still several times the cost of purchasing)
Or is it possible for you to do math and realize that within a year or two, the savings on electricity consumption will exceed the return on investment.
Due to the use of modern LEDs for more than 50,000 hours (
By contrast, 2,000 of ordinary bulbs)
Returns on investment are rising.
Now, some people would argue that it makes sense to wait until the LEDs are cheap and efficient, but, if you calculate it, you\'ll find the fact that, it\'s better to replace the feature-perfect bulbs with LEDs now, and then plan to replace them in a few years, even if they have a few years left. How so?
Because the cost of power lighting is almost equivalent to the cost of power --
It\'s all operating costs, not hardware costs.
So, if you want to switch to LED lighting, then here are a few pointers on what to look.
First of all, understand that low-cost, low-power led does not really replace most existing lighting devices.
Low cost is a wrong economy in this area.
However, the more expensive brand products are definitely qualified for the job and look great and can save considerable cost.
Second, we are used to rating light levels based on wattage I. e.
Very bright 100 w, 40-
Comfortable 60 w, somewhat dim below 25 w.
This ratio does not apply to LEDs.
At present, a reasonable estimate is that an LED will produce as much light as a traditional bulb, with a power of 10 times that of a traditional bulb, so, for example, the 5w LED should be easy enough to replace the typical 50w halogen lamp.
A more direct way to evaluate the brightness is the brightness to lumens (
The output of a standard 40w bulb is about 360 lumens).
However, the brightness itself is not sufficient to determine the actual brightness of the light source.
The beam angle and the \"color\" of the light are also critical.
This leads to the third aspect we need to consider.
LEDs are inherently highly directional, and the beams are very narrow, and until recently they tend to produce blue light on the cool side of things.
This gives a fairly harsh effect, with very bright areas in small areas, but with a lot of black spots.
The modern high quality LED spotlight has a wider beam angle (
For example, 120 degrees
This creates a uniform pool of light that is much warmer in light color.
For reference, light colors are measured using the Kelvin temperature scale, where 2000k is called \"warm white\" and values above 4000 k are defined as \"cold white \".
Then, find out if any given LED bulb is suitable for the application in your mind by checking the package (
Or buy from catalog or online, product description)
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