led light bulb purchasing considerations
Choosing and purchasing LED lights requires buyers to learn new terms and consider factors that do not have to be taken into account when purchasing traditional types of lighting.
This short article provides some basic background and buy notes
Time buyer of LED replacement light.
As most people may know now, the LED represents light-emitting diode.
LEDs are actually semiconductors (
Like a computer chip.
More effective real estate lighting than traditional light sources.
When electricity passes through them, they send out energy in the form of light.
These semiconductors are mixed or injected with chemicals that determine their light colors.
LEDs will convert most of their energy to light, not incandescent lamps that produce light as a by-product
Therefore, the efficiency of led can be increased by 90% compared with the traditional household filament bulb.
Led has been widely used as a monitor and indicator for nearly 40 years.
However, it was not until recently that engineers came up with how to make and mass produce
Production of bright white LEDs for general use
High brightness, point-
The light source properties of the Led make it the first choice for traffic lights and car taillights, where visibility and reliability are critical.
So what should you know when buying LED light bulbs?
The following list provides some basic guidelines: 1.
While the initial cost per bulb is still high, the total life cost of the LED bulb is actually lower than that of the equivalent incandescent and CFL bulbs.
Considering the energy cost and time and resources required to replace incandescent and CFL bulbs, the lifetime cost of LED bulbs lasting 80,000 hours is much lower. 2.
There are a variety of Led, and-
Because the unfortunate buyer is likely to find difficulties.
Many types are useless for general lighting applications.
The best LED chip emits light with color rendering index (CRI)of 85%.
By the way, CRI is a quantitative measure of the ability of light sources to faithfully reproduce the color of various objects compared to ideal or natural light sources.
Use the LED bulb at the top
High quality led will last longer than many sold novelty bulbs, 60% longer than many competing bulbs using inferior led. 3.
Contrary to what you read in some places, the LED does generate heat, which is actually the biggest problem that manufacturers face in developing LED lighting applications.
Manufacturers can now produce single LED chips as bright as 100
Watt incandescent lamps, but these LEDs are actually useless for general lighting because installing them in a fixture creates an unresolved ventilation problem.
LEDs installed in lamps and bulbs must be well ventilated, the better the chip, the harder it will be to cool properly.
There are a lot of LED bulbs on the market that don\'t take this into account, either using cheap chips so they don\'t have to ventilate or improperly ventilate their chips, greatly shortening its life.
While a typical LED bulb has little temperature on the touch, it may fail prematurely if the chip is improperly ventilated. 4.
While the life of LED bulbs is much longer than that of traditional bulbs, take a closer look at the manufacturer\'s statement on the life of the bulbs. The life-
The span of the LED bulb should be \"half\" of it\"life.
LED bulbs will not burn out;
Instead, they fade out.
When a supplier says an LED bulb will last 80,000 hours, they mean that the efficiency of the chip will reach 50% at this point and the bulb should be replaced.
The bulb may therefore last 100,000 hours or more, but by then it will be significantly less efficient.
Use this 100,000-
Therefore, it is misleading to use hourly life as a selling point.
Although LEDs will not last forever, they will last 50-
75 times longer than incandescent lamps, 6-
8 times longer than CFL. 5.
Search online and you will find that the market for LED bulbs is full of products.
Many of these bulbs are relatively cheap (less than $20);
However, you may find that many of these LED bulbs are made up of suspicious materials and suspicious processes.
Good LED bulbs are more expensive than these cheap ones because they use high
High quality chips at prices determined by well-known manufacturers like Cree.
This means that while these LED bulbs are more expensive, their advantages are much greater. 6.
The traditional dimmer cannot dim the LED bulb.
Constant current is required to operate the led.
Because of this, it flashes regularly if the standard dimming method is adopted, or worse, it doesn\'t work at all.
In order to dim the LED lights, 0-
In order to \"cheat\" the LED to emit less light, a 10v dimming module is required.
In theory, all LED lights can be dimmable through this module. 7.
When comparing LED bulbs, you need to know lumens.
Lumens is a standard unit that you can use to compare LED bulbs and standard bulbs such as incandescent and halogen lamps.
Roughly speaking, lumens are a measure of brightness.
The quantity of lumens is important, but the quality of lumens may be more important. e.
Luminous efficiency (lumen/Watt).
High quality led luminous efficiency today at 60-70 lumens/watt. 8.
Color and gentle beam diffusion are other key tools for comparing LED lights.
Measure color temperature and beam expansion in degrees.
Color temperature refers to the color of the light emitted.
Generally, 3000 Kelvin is warm White (
Closer to infrared)
5000 Kelvin is cold white (
Closer to UV rays).
The cold white is brighter because it is the natural color of the LED light, and the chip that emits warm white light requires a phosphorus \"filter\" to \"warm\" the color temperature, thus reducing the brightness of the chip.
Beam propagation is the angle of the light being emitted.
The lower the number, the more light is like a \"spot \".