LED floodlight Product Features:
    1.using Epistar , Bridgelux chip integrated encapsulated single 10-80W high power LED, brightness 70-80LM / W, the light fades , high brightness, good thermal conductivity .
    2.die cast aluminum alloy shell paint handling, steel and transparent glass , LED lighting is directly connected with the aim to achieve a good heat , light body waterproof rating IP65, corrosion, dust, water , shock .
    3.professional optical design with light aluminum reflector, high light efficiency , high light utilization efficiency . Start within three seconds to reach normal brightness, high color rendering index , red , green, blue , yellow, white and other colors to choose. Components: a high thermal conductivity and corrosion of aluminum heat housing , aluminum reflector, the mounting bracket ; transparent glass mask ; Epistar , Bridgelux chip high power LED light source ; wide voltage constant current source.
    Application: floodlights cast light can provide illumination for decorative lighting places the plant location , stadium , pier , billboards , buildings , gardens, tunnels and so on.
    In the prior LED lighting technology level , since 80% of the input energy is converted into heat , thus cooling the heat chip is critical. LED heat sink material is mainly internal resistance and interfacial thermal resistance .
    The main function of the cooling base is absorbing heat generated by the chip and to the thermal conduction , heat exchange with the outside world ; while reducing the interface and the interface contact resistance and enhance heat dissipation is also key , so the chip and heat sink thermal interface base material selection is very important that the current low temperature or eutectic solder paste or silver plastic .
    At this stage, the white LED achieved primarily through three forms :
    1. using blue LED chip and phosphor, the blue and yellow two complementary colors or white light with a blue LED chip with red and green phosphor, blue light emitted by the chip , red and green phosphors emit three color mixed get white ;
    2.the use of near-ultraviolet LED chip emits ultraviolet excitation trichromatic phosphor white light .
    3.using red, green , and blue light-emitting LED combination that is multi- chip white LED;
    Is currently widely used second way , using blue LED chip and phosphor, complementary white light . Therefore, this chip to improve the efficiency of the LED lumens , depending on the initial luminous flux maintenance factor and light blue chips.
    LED use in the process of photon radiation generated during launch complex outward prone to damage, loss mainly in three aspects :
    1. the chip structure defects and the absorbing material , the photon reflection loss caused by the radio interface due to the difference in the refractive index ;
    2. the angle of incidence greater than the critical angle of total reflection and reflection loss of lead ;
    3. the chip surface is covered by a layer of relatively high refractive index of the transparent layer to effectively reduce the loss of photons at the interface to improve the light extraction efficiency .
    Therefore, it has required high transmittance, high refractive index , thermal stability , good fluidity , easy to spray, the same is to improve the reliability of the LED package which requires a low moisture absorption, low-stress and anti-aging properties. And usually also need to chip white LED blue light excitation issued $ phosphor synthesis glow in the plastic packaging needs to be added to the phosphor mixing ratio , and thus the conversion efficiency of phosphor excitation efficiency is the key to high light efficiency .