led power

Let’s remember the definition of the law of conservation of energy. The change in potential energy is going to be the change in kinetic energy You have conservation of energy principles. the nation law ,we can’t break it. also include led power, now we used led as an example .if all energy(led power)put into led , the electrical energy will be charge to power(P) when led is working, the electrical energy converts two kinds of electrical energy — a energy for lighting(we call optical PV) and other energy for heat(we call thermal power PH).
We were at the front, show a different distribution pattern for led power.Next, let’s look at the formula for led power.

LED Lighting Luminaire’s Photometric vocabulary
* basically parameters
luminaire lumens
effective luminous flux
luminaire efficiency
central intensity
maximum intensity
angle of maximum intensity
beam angle
intensity data distribution
iso illumiance

*indoor lighting parameters
basically parameters
up flux rate
down flux rate
maximum s/h
luminance limit curve
utilization factor table of indoor
budgetary estimate table

*spot led light parameters
basically parameters
half peak side angle
type B intensity data
zonal flux distribution table
space iso intensity curve

*road led light parameters
basically parameters
maximum s/h
up flux rate of stree
up flux rate of house
down flux rate of stree
down flux rate of house
zonal flux
iso candela diagram on circular web
coefficicen utilization curve

The uv led advantage is very obvious, if we compare with traditional ultraviolet lamp and uv led strip. as we will show some advantage of ultraviolet led production.

1)、ultraviolet led is cool light source ,without heat radiation . other words : it can’t produces heat when working . and thus creation of better work environment for other device.

2)、high efficiency; light energy of ultraviolet led centre upon one specific wavelength(ultraviolet spectral band) . although the traditional ultraviolet looks so bright ,  but it has a wide ultraviolet spectral band. only small number of valid ultraviolet spectral band devote to work as well . so the efficiency is so low.

3)、long service time; ultraviolet led has long service-time, the valid service time can meet to 20000-40000 hours .

4)、high staring speed; the ultraviolet has quick starting speed and reliable running.

5)、electricity consumption low; much less electricity than traditional ultraviolet lamp and last much longer.

6)、more environmental protection ;without mercury and it produces absolutely no ozone.

UV LED electronics character
UV led strip is currently controls device , the load character are like that curve chart of PN junction .you can get a view that it flow past from here in chart. even a very small change in the forward voltage for forward currently can have a very big impact. reverse current is small, and reverse voltage did exist. the consummation divided into two sections: a portion of energy transform to light , and other portion of energy turns into heat energy .

Did PWM affect LED service time?

The PWM(pulse width modules ) is one of the primary regulate light way. it is only not easy to achieve , it is import thing that user can control currently of led. but also have a lot user worried about it’s hurt to led . That is impossible, i know you don’t believe me, but I can prove it to you. please see information as follows:

To obtain the prerequisite, the big junction temperature(Overlarge heat stress may destroy the led  service time) is necessary and high frequency of led PWM 。on the contrary, the led e layer to form a larger thermal stress; layer to form a larger thermal stress,
you may rest assured use it in adjusted light circuit.