LED lamp performance comparison with traditional fluorescent
CREE LED lamp is used with EDISDN super bright white LED as light source , the shell is acrylic / aluminum alloy . Housing available PC pipe production , high temperature of 135 ℃. LED fluorescent tubes light with conventional fluorescent lamps in the dimensions are exactly the same caliber , length 60cm and 120cm, 150cm three, the power was 10W, 16W and 20W, and 20W traditional fluorescent lamp ( EM ) the actual power consumption of about 53W, 40W traditional fluorescent lamp ( EM ) the actual power consumption of about 68W. 10W LED fluorescent light even brighter than traditional fluorescent lamp 40W , 16W LED lamp should light than traditional 64W fluorescent lamp , LED fluorescent light in particular, appear to be more gentle , more people access to the grant . Life of 50,000 hours or more, the supply voltage of AC85V-260V ( AC ) , without starter and ballast, quick start , low power, no flash, not easy visual fatigue. It is not only more environmentally friendly energy superpower . Is a national green energy-efficient lighting projects focus on developing one of the products , is to replace the traditional fluorescent lamp ideal product.
LED fluorescent installation is relatively simple , it points to two kinds of internal and external power supply , power supply built-in LED lamp installed, removed and replaced by the original UL T8 LED Tube and ballast and starter removed, let 220V AC mains LED Tube ends can be directly added . External power supply with a dedicated LED fluorescent general lighthouse, replacing the original , you can use it. LED fluorescent tube energy saving up to 80 % or more, lamp life of more than 10 times , almost maintenance free , there should always replace the lamp , ballast, starter problems, about six months down the cost savings can exchange costs . Environment-friendly semiconductor light source , light and soft , pure spectrum in favor of workers eyesight and physical health , 6000K cool white light gives a cool visual experience and helps to focus and improve efficiency.
LED fluorescent light-emitting principle :
The terminal voltage of the PN junction to a certain barrier , the times when the base plus the forward bias voltage drop , P and N regions of the majority carriers spread to the other . Since electron mobility than hole mobility is much greater, so there will be a large number of electrons to the P diffusion region constituting the P region of the injection of minority carriers . These electron -hole recombination and the valence band , the obtained compound in the form of light energy in the release out . This is the principle of light PN junction .
LED fluorescent luminous efficiency:
Generally called component external quantum efficiency , which is a component of the internal quantum efficiency of the extraction efficiency of the assembly of the product. The so-called component's internal quantum efficiency , in fact, the electro-optical conversion efficiency of the component itself , the main characteristics of the component itself ( such as component material's band , defects, impurities ) , a component of the base composition and crystal structure related . The extraction efficiency of the component refers to the internal components of photons generated in the component itself after absorption, refraction , reflection , the actual measurable outside the component to the number of photons . Therefore , the factors on the extraction efficiency of the material itself absorbs the component , the component geometry , components and packaging materials , and the refractive index difference component structure scattering characteristics. The component's internal quantum efficiency of the extraction efficiency of the component of the product, the entire assembly is light effects, which is an external quantum efficiency of assembly . Early component development focused on improving its internal quantum efficiency is mainly by improving the quality and changes barrier barrier crystal grain structure, so easy to convert electrical energy into heat , and thus indirectly enhance the luminous efficiency of LED Tube , thereby obtaining about 70% of the theoretical internal quantum efficiency , but such internal quantum efficiency is almost close to the theoretical limit. In such a situation, the component alone to improve the internal quantum efficiency is not possible to increase the total amount of light components , thus improving the efficiency of extracting the components has become an important research topic. The current methods are: grain shape changes - TIP structure, surface roughening techniques .