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System Efficacy

In order to work efficiently, a luminaire must succeed in terms of optical efficiency, light source efficiency, body and cooler efficiency and driver efficiency by combining all these factors at the same time. The efficiency of a luminarie is measured by the unit of Im/W, which means the amount of light emitted in return for the total electrical power consumed.

 

LAMP 83 carries out design works for all the luminaries with LED and conventional lamps and manufactures them in a way to offer maximum efficiency, thanks to using best components available.

 

Evaluation of the efficiency of the entire system and the power consumed in return for the amount of light obtained (lm/W), as well as the electricity power spent by the LED, according to the following factors will allow the consumers to make the correct decision especially when they are purchasing a luminary with LED.

 

a-Optical efficiency:

In order to direct the light coming from its source to a surface, lenses which are called reflector or secondary optic are required. In lighting provided through the conventional light sources and reflectors, in maximum up to 80% of the total light current emitted by the light source can be directed to the object required to be illuminated.

 

LEDs emit light to a single direction with a broad angle. When appropriate optical solutions are used, it is possible to achieve 90% use of light with LEDs.

 

LAMP 83 uses reflectors and lenses with different angles which are specially designed and suitable for all sorts of needs in its products.

 

b-Light source efficiency:

While an important proportion of the energy in the conventional light sources transforms into heat, this proportion is relatively low in the LEDs. Thanks to such features, the luminaries with LED provide more light compared to the conventional luminaries, despite consuming less energy.

 

When choosing a LED, prefer the LEDs with high light current and low thermal resistance to increase the efficiency. The products with high efficiency must be preferred also in other types of lamps.

 

c-Thermal efficiency:

If the LEDs are operated especially in an environment hotter than the ideal operation temperature, this will decrease both the amount of light and the life of the LED. Therefore, another argument required for the system efficiency in luminaries with LED is the design of coolers. Cooler, first of all, must be designed in the most suitable way according to the need.

 

In the luminaries with LED, the heat of the chip of the LED must be discharged. Therefore, the thermal efficiency must be high. The four main factors which affect the thermal efficiency can be listed as the structure of LED, PCB (Printed Circuit Board), thermal paste (a paste which makes the heat exchange between metals more effective, thus providing better cooling), and cooler. High thermal conductibility of these four factors brings out the thermal efficiency of the entire system.

 

d- Driver efficiency:

When LEDs are operating, heat is generated at their chips and this heat generation leads to a change in the internal resistance of LED. Therefore, LED tries to draw more current. The LEDs trying to draw more current begin to get even warmer. With this ever continuing cycle, maximum operation heat and power consumption recommended for LEDs are reached and therefore, LEDs may start to break down. In order to prevent such break downs, LED drives which are designed specific to LEDs are required. The difference of these LED drives from the usual power sources is that they provide constant-current output instead of constant voltage.

 

The fact that LED and metal halide lamps have a long life, they are thermal protected having short circuit protection and they are used along with high quality and certified drivers and ballasts will increase the safety of the system and decrease the costs of use.