LED Headlights

himun_hino

apa pendapat korang pasal bulb LED ??
sapa2 yg penah guna, rebiu sket pliss.
pros n con.





yg pasti  kompom LED bulb kurang panas berbanding bulb halogen biasa.
kalu guna bulb halogen murahan lagi best, lepas 6 bulan headlight jadi
kuning katarak

zulka

tak pernah guna...takut kena saman

himun_hino

zulka replied at 20-6-2016 12:24 PM
tak pernah guna...takut kena saman

oww... means LED headlite sama silau mcm HID kah??

zulka

himun_hino replied at 20-6-2016 02:18 PM
oww... means LED headlite sama silau mcm HID kah??

tak la..as long not more than 4500K takde masalahpun..

zulka

LED HEADLAMPS

The automotive industry has evolved a lot, that's for sure. Along with it, headlamps have reached another level and, after carmakers closely analyzed the way halogen or HID lights influence their models, turn to another option: LEDs. At least on paper, LEDs seem to be the solution for mass-produced cars but there are
Automotive LED headlamp bulb
also several setbacks that could change the world's perspective over this type of technology.

The working principle of an LED is quite hard to explain, but in short words, they rely on negative electrons moving against positive “holes” across a semiconductor. When a free electron falls into a hole that sits on a lower energy level, it will loose its energy which is released as a photon (the tiniest fraction of light) in a process called electroluminescence.

Multiply this process thousand of times per second and you have a continuous bright light being emitted from something about 2 mm wide - a light emitting diode (LED).

The most important aspect when it comes to LED headlights is the fact that they need very low power to work compared to classic halogen bulbs. LEDs are for instance used on Toyota Prius models and on a couple of other hybrids on which electricity plays a key role - not necessarily for the headlights. The first production units were to be found on the 2004 Audi R8.

Generally speaking, LED headlights are stacked in between the halogen and HID lamps regarding their luminescence, but they provide much focused rays and can also be played with to create different shapes.

Also, thanks to their small size, LEDs allow for great manipulation, with manufacturers being able to create all kinds of shapes and assemblies that would perfectly match their models, so no more ugly dome reflectors.


Audi LED daytime running lights

Full LED headlights

Healight with full LED clusters
There are a number of issues to be clarified however. For example, although LEDs do not emit heat as they light up, like halogen headlights for example, they do create a certain amount of heat at the bottom of the emitter (mainly the chip) when the electricity passes through, thus creating a potential risk for adjacent assemblies and connectivity cables. Reason why LED headlamps need cooling systems, like heat sinks or fans to keep them from melting.

Oh, and let’s not forget that these cooling systems are located in the engine bay, a not-that-cool area for some other system to maintain a decent temperature. Reason why, LED headlights are also harder to design and implement to a car, thus more expensive than HIDs.

Why aren’t LED daytime running lights or LED taillamps using heat sinks? Simply because nobody relies on them to navigate in the dark. Thus they don’t need to be as powerful as headlights, meaning that the current run through the chips won’t be enough to pose that much of a heating problem.

To wrap it up with the LED headlights:

ADVANTAGES:

•        small size, allow great manipulation for various shapes
•        very low energy consumption
•        brighter than halogen headlights while still offering a warmer light than HIDs

DISADVANTAGES:

•        high production costs
•        high temperature created around adjacent assemblies
•        more difficult to design and cope with the already high engine bay temperatures

Read more: http://www.autoevolution.com/news/battle-of-the-headlights-halogen-vs-xenon-vs-led-26530.html#ixzz4C6DginNQ

Djeader

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https://cariffy.com/bmw-8-series-gran-coupe-2022-and-what-to-know/

Jitu

klu headlamp jenis reflector jgn guna nnt silau org depan mmg asyik kena maki je lah
led cuma boleh guna utk headlamp jenis projector  beza dia projector ada lens utk fokus kan cahaya lampu manakala jenis reflector cuma pantulkan cahaya je
headlamp jenis projector lebih bagus tp mahal banding dgn jenis reflector



contoh jenis reflector


contoh jenis projector

eddyann

reflector kalau nak pakai juga, silau boleh dikurangkan kalau standard kilang lampu reflector tu ada macam pengatup yg dipanggil glare shield. contoh glare shield boleh nampak dalam lampu myvi 1st gen. compare dgn kancil lama lampu bulat. dua2 tu reflector, myvi yg ada glare shield

himun_hino

zulka replied at 20-6-2016 02:40 PM
tak la..as long not more than 4500K takde masalahpun..

setelah himun study serba sedikit tentang led headlight.

rasanya led headlight tak jauh beza dgn normal halogen bulb.
cuma warna putih led headlight ada jenis yg tidak menyenangkan
pemandu lain (agak silau) iaitu warna kod melebihi 4300k
yg betul2 menyilaukan ialah jenis HID kerana wattagenya ditingkatkan.

utk housing reflector dan projector,
kedua2nya adalah teknologi yg dibangunkan mengikut zaman.
reflector cahaya suluhannya lebih kembang
berbanding projector cahaya suluhannya lebih tertumpu pada suatu sasaran dgn bantuan kanta.

namun,
hayat led bulb tak setanding normal halogen bulb yg mampu bertahan lebih 5 tahun.

PCgamingpure

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