We all know that Thomas Edison invented the light, he made light of very smart, use the principle to do a lot of invention to the light, led energy saving lamps, LED lamps, LED fluorescent tube, LED flexible strip, LED bulbs , LED lighting, and so on. These are all good inventions. Here is the light to bring the advantages and disadvantages of our lives.

Advantage

    High energy conversion efficiency under low light - that is more energy-efficient, and very suitable for use in low light demand. But when the luminosity to improve to such as sets of headlights as or higher LED efficiency than incandescent light bulbs, but worse than the fluorescent lamps: IEEE Publications IEEE Spectrum had an article confirmed this.
    Short reaction time (switch) - can achieve high flicker frequency, and even the visible network as possible.
    Long life - not affect their life due to the continuous flashing, up to 35,000 to 50,000 hours in the heat and environment.

    Resistance to shock and mechanical shock - due to the solid-state components, there is no filament, glass, etc., the relative fluorescent, incandescent, etc. can withstand greater shock.
    Small size - its own volume can be made very small.
    Easy to focus - light-emitting volume small and easy lens, etc. to achieve the required distribution extent, by changing their package outline, the emitting angle scattering by the large angle to the fine point of view focusing can be reached.
    The monochrome strong - single level light photon wavelength is relatively simple, without the filter to provide a variety of pure color.
    Color gamut is slightly broad - wide part of the white LED cover the color gamut than other white light sources.

Shortcoming

    Old LED high brightness efficiency is low, is still power-hungry than fluorescent lamps for general lighting purposes, some LED lights and even power consumption than the energy saving bulbs. Some designs use many pieces of LEDs, each LED can work at a lower luminosity, which increases efficiency, but greatly improve the cost, while maintaining the overall luminosity selling price higher than other types of bulbs.
    Efficiency affected by high temperature and a sharp decline, wasting electricity, apart from generating more heat, the temperature to rise further, creating a vicious cycle. In addition to the waste of electricity but also shorten the life, so you need a good heat.
    LED brightness is not a linear relationship with the current brightness adjustment is slightly more complex.
    Higher costs, higher selling prices.
    Because LED as light source area is small, are more concentrated, for lighting purposes glare optical design requires the use of scattered light.
    CRI has yet to strengthen.
    Each LED in the characteristics due to the production of technical problems, there are some differences, even the same batch of LEDs are also many differences.

   Light not only in our lives plays an indispensable role, and bring light back to our lives.