2015年4月8日星期三

The advantages and disadvantages of LED lighting for vehicles

Taillight
The purpose of the taillights is to remind the trailing vehicle to be careful, so that it can has more time to prepare and take appropriate measures to deal with emergency situations. Generally taillights don’t need to be too bright, only can be lit and transfer warning signal to the trailing drivers.



In recent years, red and yellow LED technology is very mature, which provide more space for LED designers to design different types of LED taillights. LED taillights are very small and very easy to use, and it can work at low voltage and have simple electric circuit design. Moreover, LEDs emit light in a specific direction according to different need, and the high brightness within a certain angle has a very obvious warning effect. Different fixtures are equipped to prevent the light from reflectors and reflecting into undesired directions and most of the light can be fully used. The features make the LED lights more efficient. However, LED taillights also have many disadvantages, they are expensive and difficult to maintain. You have to check the LED taillights for cracks; otherwise it will damage the components inside the fixture because of the moisture intrusion. In addition, the drive circuit is relatively complex and need some support from PCB board. In summary, LED taillight technology is relatively mature, and has been adopted by many manufacturers.




Interior lighting
Interior lighting is mainly used for temporary lighting, and has no high requirements in terms of color temperature and brightness.



LED interior lighting is suitable for use inside the car in a short time, and its color temperature and brightness is able to create a comfortable environment. LED interior lighting is applied widely in different types of vehicles because of the lower power consumption and long lifespan, saving more cost in energy and maintenance. However, there are some difficulties in beam pattern design, for you have to consider many sectors, such as the shape of fixture, the color option and mounting bracket. LED interior lights don’t apply for long time lighting, if you still want to do that, you have to equip some cooling device with the lights. The appearance is distinct with the conventional lights, not made of glass, which is easily broken. The interior LED lighting has good function of shockproof, waterproof and dustproof, but its maintenance performance is very poor. All in all, as for interior lighting, LED lighting has some obvious advantages over incandescent lights and fluorescent lamps.




Headlights
Headlights are the most important lights for a vehicle, it just like the eyes of the vehicle, to ensure the security of the driving, especially at dark night.




Like mentioned above, LED headlights are also energy-saving and have a long lifespan, and the power circuit design is simple, too. Headlights are used to illuminate the road ahead in order to avoid all obstacles roadside, and hence, it must provide sufficient illumination. At the same time, the feature must be configured better cooling devices. LED headlights have different types of beam pattern, some are spot beam, the other are flood beam, but in recent years there has been combo beam pattern, which meet the requirements of long distance and wide range illumination. However, the beam pattern design is complex, and there are still some difficulty to achieve the best lighting effects between spot beam and flood beam.



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