LED technology


After understanding the various types of bulbs used in stage lighting, this time we will focus on discussing the development of LEDs specifically.

LED technology has come a long way since it was first introduced. Starting from Single Diode, SMD, to the last COB.


Single Diode

Initially, single diode LEDs only produce one color of light such as red, or green, or blue LED. To obtain light of various mixed colors, a fixture using a standard single diode must place a number of diodes of different colors in one housing, which are lit together, or partially, depending on the desired color. For example, to get purple, partially turn on blue and red diodes. To get a yellow color, some red and green diodes, and so on. The problem is, sometimes the light produced is shaded when illuminating an object because the light source varies from various points.


SMD (Surface Mount Diode)

With SMD LED technology, several LED color chips can now be attached to the PCB surface, making it possible to produce various combinations of light colors from one diode. With this SMD technology too, now the light produced is no longer shaded because a mixture of colors is produced from the same LED. SMD LED usually also uses the term 3-in-1 / Tri-LED for LED which is a combination of 3 LED colors, or 4-in-1 / Quad-LED, to 6-in-1 / Hex-LED for example RGBWAUV.


COB (Chip-On-Board)

COB LED or Chip-On-Board technology is the latest LED technology that can produce very bright light (high beam output) and with a very wide but very even coverage area (beam angle). Without a central point of light.


The development of color technology in LED

Based on the color type, LED technology now consists of R (Red), G (Green), B (Blue), A (Amber), W (White), UV (Ultra Violet / Blacklight).


At the beginning of its development, LEDs were only able to produce color combinations by combining red, green, and blue or better known as RGB. However, because it is very difficult to get the true amber (similar to orange), a specific LED diode is made to produce that color.


Likewise with white light (white). Originally white light attempted to achieve by combining all light colors, but because it was very difficult to get completely white results in the same fixture, some professional fixtures have now added white LED diodes.


The last is LED UV or ultra-violet or also known as blacklight. Blacklight is widely used at events such as birthday parties, Halloween, theme parks, museums, and the like. Blacklight can give the unique effect of 'glow in the dark' where all objects that are white or whose materials contain phosphorus appear as if they are emitting light. And UV LEDs, which previously had to be purchased separately, now we can find that they are integrated with other LED fixtures.


When these colors are combined, it can produce a variety of fixtures with varying color combination capabilities, including RGB, RGBA, RGBW, RGBAW, and RGBAWUV. This is one of the factors that differentiates the price of cheap and expensive LED fixtures.

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