What’s an LED?
Meaning of LED：
Light-emitting diode is a semiconductor solid-state light-emitting devices, it is the use of solid semiconductor chips as light-emitting materials, when the two ends of the forward voltage is added, the carriers in the semiconductor compounding caused by photon emission and produce light. Can directly emit red, yellow, blue, green, cyan, orange, purple, white light. LED features: Multi-variable: LED light source can be used to LED through the short time and the principle of red, green, blue three-color, under the control of computer technology to achieve the color and pattern of the multi-variable, it is an easy to control the “dynamic light source”. Long service life: LED light source without filament, low voltage, can last up to 50,000 to 100,000 hours. Environmentally friendly: no harmful elements in production, no release of harmful substances in use, no radiation.
Lamp Base：
Lamp holders are the bridge between the bulb and the power supply lampholder, with different types of lampholders connected in series. Since one size does not fit all, various types of lampholders are available to match various lighting fixtures.
Luminous flux :
Different bulbs produce different amounts of light. The amount of light or brightness output that gets expressed in lumens. The lumen gain of a bulb produces the brightness of the light. Some bulbs are indeed brighter than others, meaning they are suitable for different uses.
Wattage and Lumens Watts and lumens:
Most people think that the wattage (W) of a light bulb represents the intensity of the bulb’s brightness. However, the wattage only tells you the amount of power used by the bulb. Bulb brightness is actually measured in lumens (lm). Therefore, to know the power used by the bulb. How bright it is, you should consider the lumen value of the bulb, not the wattage. The higher the lumen value, the brighter the brightness.
Color Temperature :
The unit of color temperature is Kelvin, and the color temperature value determines whether the light bulb produces warm or cool-toned light each. The color temperature of modern light bulbs is different, warm yellow light has a lower color temperature and a lower K value, giving people warmth and comfort. The cooler blue light has a higher color temperature and a higher K value, making it more spiritual.
Beam Angle :
The width of the illumination should be noted when selecting the area. Spotlights and standard lamps distribute light differently, and the shape of the bulb has a great impact on the lighting effect. Standard bulbs distribute light 360 degrees. Spotlights can distribute and concentrate light at a beam angle of 10-36 degrees.
Color renderingColor rendering index:
The sun is the most natural light we have, and as such has become the benchmark against which other light sources are compared. If the sun were a light bulb, it would reflect color in exactly the same way. Natural outdoor light has a Color Rendering Index (CRI) of 100 and is therefore the standard of comparison for any other light source. The CRI of light (on a scale of 0 – 100) assumes a heavier weighting of color than nature.
Several factors that cause price differences in LED lighting products：
1、Length
LEDs have different brightness and different prices. LEDs used for LED lamps and lanterns should comply with the standards of laser class Ⅰ.
2、Anti-static ability
LEDs with strong antistatic ability have long service life and thus high price. Usually LEDs with anti-static greater than 700V can be used for LED lighting.
3、Wavelength
Wavelength consistent LED, color consistent, such as the requirement of color consistency, the price is high. No LED spectrophotometer manufacturers are difficult to produce pure color products.
4, leakage current
LED is a unidirectional conductive light emitter, if there is a reverse current, it is called leakage current, leakage current is large LED, short life, low price.
5, light-emitting angle
Different uses of LED its light-emitting angle is not the same. Special light-emitting angle, the price is relative. Such as full diffuse angle, the price is relative.
6, life
The key to different quality is the amount of consumption, the amount of consumption is determined by the light decay. Light failure is small, long consumption, long consumption, high price.
7, LED grain
LED luminous body for the wafer, different wafer, the price difference is very big. Japan, the United States of America’s more expensive wafers, Taiwan and China’s local manufacturers of LED grain prices lower than Japan, the United States.
8,Wafer Size
The size of the wafer is expressed in terms of the length of the edge, and the quality of large-chip LEDs is better than that of small-chip LEDs. The price is proportional to the wafer size.
9, colloid
Ordinary LED colloid is generally epoxy resin, with UV and flame retardant LED price is more expensive, high-quality outdoor LED lighting should be UV and flame retardant.
Interior Lighting Design:
In the doctrine, lighting lighting very many kinds of settings.
Generally are the main lighting, local lighting (accent lighting), mood lighting (atmosphere lighting) and other three major types.
- Main lighting:
The principle is similar to the weak sunlight, its brightness in line with people’s general activities as the premise, so that the entire space of light evenly distributed lighting. For example, ceiling lamps or ceiling lights. - Localized lighting:
In order to set up a particular need and situation, the focus on the light concentrated in a particular area of space. For example, reading lamps, kitchen platforms, dining tables, etc. to facilitate cooking. - Interesting lighting:
Purely decorative effect, can also be used to highlight the room decoration or furniture. For example, the entrance, the bar at the candle, or Christmas tree bulbs. - What is indirect lighting?
Known as “indirect lighting”, the light source of the lamps and lanterns is reflected upwards to the ceiling and then diffused downwards (or to the wall and then diffused to the side), in order to achieve a slight illumination effect; because the lamps and lanterns and light sources will not be seen directly, so it is also known as indirect lighting. - What is semi-indirect lighting?
If the light source of the lamps and lanterns and illuminated body between the semi-transparent acrylic or glass barrier, so that you will not directly see the lamps and lanterns and light sources (sometimes see the lamps and lanterns of a side)), but also to achieve the effect of soft illumination of this type of categorized as “semi-indirect lighting”. - What is direct lighting?
In the strict definition, the user will directly see the “light source” (bulbs, lamps) of the lighting method and lamps, can be collectively referred to as “direct lighting”. - What is semi-direct lighting?
The definition of this category is relatively vague, I define: “will be directly” lamps “and light will be directly illuminated by the illuminated object, but will not directly see the” source “of lighting can be called” semi-direct lighting “. Exposed and ceiling-mounted projector lamps are examples of this type of lighting.
Related articles :
Ampere (A):
The unit of measurement for current; it is related to voltage and power as follows. Current (A) = Power (W)/Voltage (V).
Power (P):
The rate at which energy is used or provided; power is measured in watts (W).
Voltage (V):
The unit of measurement of electric potential in a circuit or device, expressed in volts (V).
Watt (W) :
A unit of electrical power. Lamps are rated in watts to indicate their power consumption. The power consumed over a period of time is equal to the amount of electrical energy used.
Average Rated Life (Hours):
The average time it takes for a lamp to burn out.
Transformer:
A device used to transmit electrical energy to convert voltage into usable energy is a light bulb.