Bi-Xenon Adjustment

jasons6930 · Jan 19, 2018

Hi all,

Currently running 25W HID lamps (factory fit), and the light output is quite poor considering.

The current Headlight Dimming Voltage is set to 13V, so would it be better if i increased this to around 13.2V to give a slightly brighter light output?

Or do they run at maximum voltage anyway?

I realise this may shorten lamp life.

iichel · Jan 19, 2018

that's about a 1.7% increase in voltage. do you think it will make a difference?

jasons6930 · Jan 19, 2018

Dunno

Looking at lamp spec, it has a tested Voltage of 13.5V with a nominal voltage of 40V.

I was thinking (hoping) adjusting this would give a little more light as they do seem underwhelming for an HID lamp!

downtime · Jan 19, 2018

It has no effect to xenons. Ballast will regulate the voltage for the bulb so the output will be exactly the same no matter where you adjust the voltage.

jasons6930 · Jan 19, 2018

Ah fair enough.

Ill leave it alone.

Thanks

downtime · Jan 19, 2018

How old are your bulbs? Xenons do tend to dim overtime as well. So if they're several years old, replacing them with fresh ones might brighten up the scenery

iichel · Jan 19, 2018

apart from that, I thought HID's nowadays are all 35W?

langers2k · Jan 19, 2018

There are now 25W HID systems that produce less than 2000lm so don't need self-levelling or washer systems, at least in the EU

downtime · Jan 20, 2018

Exactly. VW Beetle and Skoda Rapid for example have 25w xenon system. And like langers2k already wrote, they don't need washers or automatic leveling as the output is less than 2000lm.

jasons6930 · Jan 20, 2018

downtime said:
How old are your bulbs? Xenons do tend to dim overtime as well. So if they're several years old, replacing them with fresh ones might brighten up the scenery

They are less than a year old with even less usage.

Problem is, for the D8S lamp, there are no other manufacturers that make an alternative either for me to try, unless i am missing something.

Shame, as they are ok on dry roads at night, but if they are damp they appear quite dim.

PetrolDave · Jan 20, 2018

langers2k said:
There are now 25W HID systems that produce less than 2000lm so don't need self-levelling or washer systems, at least in the EU

And 55W HID systems are available in the aftermarket too.

Bi-Xenon Adjustment

jasons6930

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iichel

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downtime

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