The two main technologies are:
LEDs SMD (Surface Mounted Device)
We can classify the SMD LEDs in two categories: low power and high power LEDs. They are mounted in different products and cover different areas of application.
The LED of COB (Chip On Board).
The latest technology, but who still needs to evolve to be competitive.
The SMD LEDs low power
They are mounted on the headbands and some spots or blisters and are of the type “SMD” (Surface Mount Device). You will most often find 3014, 3528, 2835, 5050, 5050 RGB, models 5630.
5050 RGB model allows to integrate three LEDs of different colors in a single LED and is used to make Ribbons that can change color (RGB or RGB (red, green, blue) in French).
The following image shows two types of ribbons:
The SMD LEDs high power
They are at least 1W and are mounted on all types of media: spots, light bulbs, lights, outdoor lights…
They require systems to dissipate heat (radiators). The heat produced is not very high and you can still touch a bulb, even after hours of use. On the other hand, the LEDs are sensitive a heat, and without proper dissipation system, they crack prematurely.
The returned light output is not always proportional to the power consumed. This type of LED generates approximately:
for a 1W LED:
- 90 lumens / Watt in natural white.
- 75 lumens / Watt warm white.
for a 3W LED:
- 55 lumens / Watt in natural white.
- 45 lumens / Watt warm white.
We therefore have to focus on the LEDs of 1W which have better value “lumens / Watt”, but they the 3W LEDs allow lighting much more economical than the halogen clutter.
The following table gives the equivalent powers in halogen for 1W LED lighting:
You will find LEDs high power even more powerful: 10W, 25W, 50W… in general on outdoor spot lights. Attention in this case to their implementation: the light output is very important to their show surface and it will position them far enough away from areas to be lit.
The COB LED
These LED to generate the light over a much larger area. This facilitates their implementation and a better heat dissipation.