March 22, 2010

Headlamp Beam Pattern Regulation

1. Low Beam [H7]
H7 beam2

Looks like AHW308 H7 HID L-R alignment complies with the regulation but UP-DOWN height must be lowered a bit.
No glare at pedestrian eye level because I did not remove anti-glare cap like some people do...
A1220501HIDss
there is a slight glare when viewing at very low angle though... i.e from cat-eye view.
A1220502HIDss


2. High Beam [H1 or H1+H7]
H1 beam2


A NOTE ON AFTERMARKET HIDs
In general, fitting aftermarket HID headlamps may not always be a good idea. Why? There are many HID conversion kits out there that replace the Halogen bulb that give more light, but carries some significant problems, too.

Most significantly, the way HID-lights and Halogen lights work are very different. The main difference is that Halogen bulbs use reflectors to aim the beam, but HIDs are designed to use lenses. Replacing a halogen bulb with a HID-bulb and assembly will frequently be illegal, and will cause safety to decrease, both for the driver and for the other road users. However, there are a few good packages out there that replace the entire headlamp assembly (i.e the front glass, filters, lenses etc) with a HID unit. Go for it instead.

HID gives more, but may not necessarily be better light
Experts say, at night our eyes adapt to the warmer tones of the road/street lighting and other car headlights, and the high temperature color of HID lights might be problematic, as the eyes may not be able to register color and brightness information correctly.

Should you really choose HIDs?
In theory, HID is a good idea. In practice, more light doesn’t necessarily mean that the quality of night-vision is any better. In fact, it may be worse.

The fact that the light is so bright could make eyes adjust to the brightness. This means that what can be seen perfectly right in front of the car, but especially on wet roads, the glare may be tiring and problematic. In practice, despite the light being brighter, may not be able to see further in front at night.

Make sure to get the right [and legal] HID conversion kit.



|HOME| HID Headlamp Page|

7 comments:

Unknown said...

tak boleh tahan .. can take front photo after install ...
nampak chun or not?

Wan A. Hadi (one.D) said...

H7 bulb is hidden behind anti-glare 'cap' so cannot see la...

Probably H1 HID bulb looks chun because because it is completely naked...

Unknown said...

forgot ... no stars like this ...
if got star .. will like projector style.

Wan A. Hadi (one.D) said...

No star-like glare at pedestrian and oncoming_car driver's eye level. Only very slight glare at cat's eye level. [See the picture above]

Unknown said...

thanks for the picture ...uncle d
i must get one already ..haha
=)~

Wan A. Hadi (one.D) said...

Beh,
Pls take note that NOT all H7 HID bulbs can fit into the anti-glare 'cap' in Pug 308 headlamps - the depth can be too shallow for the HID tube [which is normally longer than equivalent halogen bulb]

Before paying make sure the bulb can 'masuk' nicely.

No problem for H1 bulb.

Unknown said...

thanks for the reminder and minute details. Best as always.

Last 7-day Most Viewed Pages

All-time Most Popular Posts