This section first checks for the existence of any UV radiation inside the element in led. can led harm us?
Many friends would be ask me this question. I see. Yes, I think I understand how you mean. because UV radiation is of concern to us, so I will use sample works to ask this question. first I want to say some thing to everyone that visible light is a kind of electromagnetic radiation. we seems a bit nervous when hear this work “electromagnetic radiation”,please to feel relaxed, not tense. led was only semiconductor material. let’s go find out more about led , led can directly translate into visible light with electric energy, it is a solid semiconductor material. what is most import part of the led. the answer is semiconductor wafers(it also is import material for uv led strip). the semiconductor wafers encapsulated into led with epoxy resin.
So the led is safe products.

Every user care to answer led question on the service time. it’s obvious that the led service is more long than traditional lamp. the reason is the led will not produce blow the fuse. and it won’t directly stop work, the led would progressively deteriorate by time fly. through we had repeatedly test, the excellent quality led can work more 50,000 hour constantly. 50,000 hour after, the luminous intensity does only one-third. but it  could at least make lit. how to make more long work time for led? the answer is dissipate heat. This is not a good solution for led service time.

The CIE system characterizes
The CIE system characterizes define that standard Illuminants(user can compare light source standard of color). with it make a clear understand of this relationship of the difference between color. if deep researcher that nature color. there are have countless color in nature(has countless wavelength from 380nm to 770nm) ..and echo color has countless level of light brightness. All this information had to be display to user with diagram. this diagram call CIE system characterizes diagram.

This is the difference between the actual performance of the CIE diagram, you can clear the domain.

Other key work is that there are has six different triangle in diagram . they means six different standard . “sRGB、AdobeRGB and ProPhotoRGB” the three kind of standard is import for your led project.

Final , we to use real objects to find more information for you .

Why do we need control the led current?

We can provide answer if we know that voltage-current characteristics of led.
In fact, the LED is kind of diode(it’s efficient Silicon Light-emitting pn Diode Prepared by Ion Implantation Locally-doped Defects) , it has voltage-current characteristics. the both sides of current of led PN junction is nonlinear . other work is: the led PN junction have slightly been increased will causing a sharp maximum in the both sides of led.  the current will reach(or exceed) the limit value and damaging the led.  the control current is necessary when using led.

the options of home lighting

A major consideration when choosing a lighting system is the size of your house.

Bedroom lighting
The illume of bedroom lamplight should consider to do design illume by different functional requirement.Lighting areawhich is only 20 square meters in size please use 32 watt energy-saving lamps

Ladies room lighting
Choose 15 watt energy-saving lamps ,if the illuminated area less than 10 square meters.

Kitchen lighting

We are planning a lighting of kitchen, if the illuminated area less than 10 square meters.we still choose 15 watt energy-saving lamps

the balcony lighting
Pleasing on the balcony, in this noisy cities in search for that a quiet and elegant . Use it to  washing cloth as well. so the balcony is a good chance to dry the washing . but the balcony should be no more than ten square meter in area .please choose 10 watt energy-saving lamps

far infrared ray
infrared ray light which is invisible light to human eyes. it has distinct heat radiation, so its physical characteristics is same that visible light . due to the infrared ray located in the outside of visible light, so we call it as infrared ray. the range of infrared ray wavelength between 0.75~1000 millimeter. and the far infrared ray (in 6~15millimeter) has import effect especially for human heath , by the way :the ir led strip is a kind of infrared ray production. the far infrared ray can improvement of cycle system of human, the scientist shall call it is “life ray”.