What are the advantages and limitations in the application of LED?

LED represent the range of crucial benefits compared to other sources of lighting. Such benefits are:

  • high luminous efficiency, defining it as energy-​saving light sources
  • high durability, independent from the frequency of switching LED on and off
  • immediate light up while obtaining the full luminous flux value
  • high shake resistance.

LED benefits can bring measurable advantages from its usage mostly in all fields of lighting usage, mainly in lighting and signaling in places which are hardly available, in places exposed to shake and vibrations (for example, bridges, vehicles), lighting signaling, etc.. It is important to mention benefits resulting from the usage of the particular LED features, which can include:

  • the possibility of direct light obtainment with different colors as well as its smooth change, without the usage of additional filters can be used in alarm systems and decorative lighting
  • the lack of infrared radiation and negligible share of UV radiation, important in the light of works of art and other sensitive objects
  • the possibility of forming a diverse individual LED light distribution, consequently an obtainment of any distribution in light housings without the necessity to use additional reflectors.

LED with its undisputed advantages indicate some shortcomings, which limitate its usage or require specific actions in order to reduce the negative impact from its application. These include:

  • strong dependence of LED parameters (luminous flux efficiency, durability) on the connector temperature, as so on the environment temperature. It requires the necessity to use heavy radiator and avoidance of LED usage in places with higher temperature, for example, strongly sunny.
  • Resultant performance of LED housing depending on the quality of LED module application (power supply, optics, cooling, etc.).
  • Interaction of LED circuits with the paremeters of supply chain due to the generation of troubles (higher harmonic). For the reduction of this unefficient phenomenon it is necessary to use particular power supply.
  • Small measurements of shining lamp with narrow angle of radiation may cause high luminances resulting in dazzle. Several LEDs can emit too strong radiation in blue band (“cold” light LED), exceptionally harmful fot the human eye. These negative LED characteristics force LED manufacturers to indicate appropriate, fair information and guidance for the users.