Its had a facelift if thats a 2005 van .

Is it just a blue coated halogen bulb ?

 

Its had a facelift if thats a 2005 van .

Is it just a blue coated halogen bulb ?

I initially thought so but when it’s on it’s very, very bright - white bright, not yellow bright with a blue cast. It’s more like the LED headlights in my Golf GTD.

 

As he says, it's probably just a tinted bulb on one side. It would be pretty unusual for someone to fit a HID kit on one side but not the other. And thankfully cheap Chinese HID kits are getting much less common now that they have started to enforce the rules on them a bit better.

As they are aftermarket lamps it's not possible to say what bulb type you're going to need without taking them out to look, but if they are H1 or H4 then you'll have plenty of choice for upgraded halogens - Osram and Philips both make a range of brighter bulbs (some tinted, some not) and they are (IMO) worth having. The only downside is that the brighter they are, the shorter the working life, typically. That may be why one of yours has already been replaced, despite what looks like a fairly recent facelift.

 

You can buy bulbs "not for road use" which are much brighter which you may have; I'd whip em out and but new as mentioned above Osram or Phillips are both worthy upgrades. I've got Phillips racing vision in mine which are much better that oem's.

 

They look like these - VW T6 LED DRL V1 Headlights - T6 Lights - Transporter HQ
And as you can read for yourself they come with different bulb options.
You'll have to take a look at what is actually fitted .
If theyre led then they might look like this - HQ LED Canbus H7 Bulbs - Bulbs & Accessories - Transporter HQ.
If theyre led behind the projector lens then they should be nice and bright.

 

What B&T said, above.

They look like the THQ T5.1 v3 DRL sequential indicator things that I fitted to mine not long ago. If so, the standard dip beam is an H7 fitment, and the main beam is H1 fitment. (Vdub Transporters also do a similar unit, with the same bulb fitments).

Uprated bulbs like Osram Nightbreakers are available, as are various LED replacements, but any LED replacement can be deemed an MoT failure nowadays, because your lights have to have auto-levelling and washers if they’re fitted with LED/HID bulbs.