Light intensity of LED
Unit of LED light intensity is lux. Lux (Illuminance) is a measurement of the light intensity at any point. It is equal to 1 Lumen per square meter. Light intensity is calculated for each surface/ polygon. The physics concepts of LED light intensity can not be divorced from its laws. it will beneficial to organisms ‘photosynthesis . we can measure is the light intensity by illuminometer .

Spectrum characteristics of white LED

The white LED is composed of a blue LED chip(( In. Ga) N) and a color conversion layer of YAG: Ce3+ phosphors dispersed in a medium such as epoxy resin. other words it mainly assembled by a blue and yellow. Please see Spectrum characteristics photo of white LED as follows;

The wither LED create light of the spectral curve. is indicated by a solid line . View the first wavelength of the peak of the spectral curve. be matched dollar-for-dollar with 460nm，and the blue and their corresponding relationship . the secondly wavelength of the peak of the spectral curve. be matched dollar-for-dollar with 580nm，the 580nm corresponding to the yellow. As you see (white LED), there are two elements: 460nm(blue) and 580nm (yellow) . This would be considered an white . light susceptibility of curve is indicated by a dotted line

Lens with the transmission rate
The transmission rate is physical verbs. it represents that the efficiency of transmission rate in display device.
The main products are all kinds of material: creamy white PC, stripes PC, transparency PC, creamy white glass cover . and they have different the transmission rate.
Type                                                Transmission Rate
creamy white PC                          80－85％
stripes PC                                        85％
transparency PC                        90－92％
creamy white glass cover      90% above

lighting principle of LED
First we know what light are different ways of changing energy from one form into another. this photoelectric transformation is implemented by diode. that happens when two atomic nuclei collide with each other, releasing energy in the form of photons. i picked on simple work to illustrate these LED principles.

LED–Light Emitting Diode, it is Semi-conductor electronic components that can lighting, and LED is a current injected device whose characteristic and life are greatly dependent on the performance of LED-used current supply. the recombination of photogenerated holes and electrons to radiating copious amounts of light when led is also observed under forward voltages .

Restraining the complex of the electrons and cavities on the reversal voltage .

And we’re talking about numbers of release energy, because it is the fundamental condition that light wavelength .(From a physical standpoint, there ought to be as many colours as there are different wave lengths)。
Calculating formula of wavelength：

LED current

The current of normal led as 10~20MA, other kind led solutions Which Adopts Low-current LED(the threshold current ranges from 1.5~2mA)
In addition to, we also measure the other color led current, as follows,

RED led voltage: 1.82-1.88V     RED led current: 5-8mA，
Green led voltage: 1.75-1.82V     Green led current: 3-5mA，
Orange led voltage: 1.7-1.8V     Orange led current: 3-5mA  ，
Orchid led voltage: 3.1-3.3V       Orange led current: 8-10mA ，
White led voltage: 3.1-3.3V       White led current: 8-10mA ，

Does this LED want install a ground cable?
If bulb has ground line ,please note that the ground line should also be connected in the lamp .because we are make sure the machine is earthed properly, Proper grounding is required. Periodically check the insulation of every electrical components to prevent possible electric shock and injuries.In generally the user should see two lines on the lamp. :neutral wire and live wire respectively! Along with this lamp. normally ,the high-power led would have connected ground cable through External rectifier(the work voltage of External rectifier is alternating current, the External rectifier with its own ground cable ). when the overloaded security protection.

The neon lights
In big cities neon lights flare late into night. it is so beautiful because the neon lights reflecting a unique decorate lamp. One of the things that’s very special about this city is the colorful variety. simple equipment make it especially suitable for high-rise building and other fields. coloring rich  of the other Advertisement lamp is incomparable.
Inert gases are suitable for generating the light in high electric field (and An inert gas such as argon is introduced to reduce evaporation of the filament.) . it is different from the an ordinary light source through high-temperature lighting. not only can create a large amount of electric energy waste, the service life of the compressor caused by larger threat. Therefore, more for the same electric energy can produces more light.

We’ll show you a few simple led DIY from today.
Tunable color for decorated lights as follows:

you can easily configure the led color with a potentiometers,
In using, the moveable arm of a potentiometer can adjust color

At the present This thesis has the system’s scheme of hardware main circuit diagram and software design.