The lumen (symbol: lm) is the unit of the International System of Units to measure the luminous flux, a measure of the light power emitted by the source. The luminous flux of radiant flux difference that the former provides the variable sensitivity of the eye to different wavelengths of light and the latter involves all electromagnetic radiation emitted by the source according Wien law and Stefan-Boltzmann regardless of whether such radiation is visible or not. 1 lm = 1 cd. sr = 1 lx. m2

The use of LED bulbs has grown exponentially due to its great advantages. The LEDs are diodes that when passing the current emit light, these LEDs are controlled with a driver or power supply, providing a very stable power source and thanks to its dissipation system can achieve high performance and many hours of illumination .

• Duration of up to 50,000 hours, thanks to its dissipation system and voltControlled air.
• Fast on. The LED lights up much faster than a conventional light bulb.
• They do not emit almost heat, so they do not burn when touched.
• They contain no gas, no mercury, no pollutants.
• They consume 80% less than traditional light bulbs. Thanks to its continuous research, it is possible that this type of technology continues to evolve and reduce its consumption.
• LWhich emit, do not radiate ultraviolet or infrared rays.
• Low maintenance, since the LEDs do not melt, it only decreases its power. This dramatically lowers maintenance costs.
• Different shades, we can find different types of LEDs where we will find different shades of light, which can go from 2700K (yellow light) to 8000K (white light) without using filters.
• Sturdiness,If we compare with conventional light bulbs we find that LED technology withstands the vibrations much better. Ideal for what type of extreme installations.
• Emitting a direct light, the LED is characterized by being a directional light, so there is no loss of light.

L: Lumens
D: Duration in years
A: Saving
I: incandescent
H: Halogen
F: Fluorescent
D: Led Diode

The degree Kelvin (K) is the unit used to classify the color temperature according to the scale created by William Thomsom from degrees Celsius. Lord Kelvin based on the table of William constructed a scale of temperatures to which its name is attributed to him.
A deeper explanation would introduce us into the world of physics, so in our sector knowing the relationship between Kelvins and kind of light will be sufficient.and.
This measurement factor is useful to know at a glance which tone or quality of light has a certain light source, for example, if we are going to buy a light bulb or a fluorescent we may be interested in knowing the kelvin it provides, as it will depend on This factor whether the light will be yellow or white.
The lower the kelvin value will be the light temperature, for example a 1600K bulb will have a temperatUra and color quality similar to the light of an exit or sunset. While a light bulb with 5000K will be more like daylight.
To better understand the relationship between kelvin and light temperature is attached the following table, where in a visual way it becomes easier to choose the type of bulb that best suits our needs.

A: It is equivalent to the temperature of a candle, it is aIn yellow light.

B: It resembles the color of dawn, it is similar to a tungsten bulb.

C: It is the tone of light of the old bulbs that were not led, filament bulb.

D: Similar to a study light.

E: Similar to mid-afternoon light about 20 °, similar to a fluorescent light warm.

F: Similar to mid-afternoon light at about 30 °.

G: Daylight, similar to a lightOf a flash.

H: Sunlight at noon.

I: Very sunny day and clear sky.

J: Partly cloudy day.

K: Cloudy day.

L: Wide shade clear day.

M: Very cloudy day.

N: Blue sky without sun.

O: Very clear day.

The COB Led (chip on board) is a plate (A) with a concentration of LEDs in the form of matrix (B) covered with a special silicone.
This type of led due to its design and installation allow to dissipate in a more efficient way the heat generated by the lighting.
It must be taken into account that the heat is generated in the opposite direction to the light and a low dissipation will cause the led to work in less optimal conditions.thus, its useful life.

Thanks to this design the Led COB is designed to work for long hours.
Its beam of light is multidirectional, so it is a type of diffuse light without dazzling at a point, achieving up to 160 º opening light and have a superior performance to the type of LED SMD.

Its manufacturing cost is 20% lower than an SMD led and its technology offers a reproducible indexchromatic ion (CRI) much higher, getting a better appreciation of colors.

In short, the COB LEDs can produce more lumens using much less energy than the rest of the LED technologies.