Thanks for this helpful post. Care to explain?

For your information, I coded mine to activate as cornering lights last night (I have LED's fitted). Guess what happened? They only switched 'on' or 'off'. No fade...hence I deactivated them again, as I don't like the effect personally.

Perhaps yours are different?

Yip mine fade might be down to the buld quality. I was also told if I changed the interior bulbs for led, they wouldn't fade. If I get a chance this evening I'll grab you a video and a link to the ones I bought.

Thanks for this helpful post.    Care to explain?

 

For your information, I coded mine to activate as cornering lights last night (I have LED's fitted). Guess what happened? They only switched 'on' or 'off'. No fade...hence I deactivated them again, as I don't like the effect personally.

 

Perhaps yours are different?

 

 

Yip mine fade might be down to the buld quality. I was also told if I changed the interior bulbs for led, they wouldn't fade. If I get a chance this evening I'll grab you a video and a link to the ones I bought.

The only way you can "fade" a multi-LED light is to turn out the LEDs one by one.

The only way you can "fade" a multi-LED light is to turn out the LEDs one by one.

As said the fogs and all interior ones fade. If they didn't I'd have reverted back to OE for just the interior.

The only way you can "fade" a multi-LED light is to turn out the LEDs one by one.

Not true, if you apply a PWM (Pulse Width Modulated) signal to the LEDs they will dim no matter how many LEDs there are in a multi-LED light.

 

Which is precisely what the BCM does.

 my interior led's DO fade, but the fogs certainly didn't, unless it's a very 'rapid' fade...?

High power 'LED headlights' (with big heatsinks) are usually not dimmable. The built-in advanced driver cuts the LED's power when the input voltage drops below ~7-8 Volts. (video)

Simpler LED bulbs (like this) are also equipped with (simpler) constant current driver (brightness is the same at 9-24 Volts) but dimming is also possible between ~6-9 Volts. (By the way you'll never get correct beam pattern with such bulbs...)

Edited 8 September, 20169 yr by aki78

I have these http://www.powerbulbs.com/product/philips-x-treme-vision-led-fog-lamp exceptionally good IMO, although expensive (I didn't get them at that price, eBay had them much cheaper).

 

Beam pattern pretty much as good as you will get from LED's I think, colour temp matches the DRL's and xenons very well too.

 

There is the tiniest bit of fade when they're used as cornering lights, it's not much, but definitely there