Tesla model S 12-16 - Stage 1 - 35 watt ballast upgrade for bi-xenon H

Low light output from the Tesla D8S 25-watt HID xenon system

The 25-watt Tesla Model S HID xenon headlights
Also not impressed by the output of the Tesla Model S D8S HID xenon headlights?
You are totally correct because the 25-watt system used in these headlights is seriously underpowered. And definitely needs an upgrade! This is fortunately possible with a minor investment in money and time.

Tesla used 25-watt ballasts and D8S bulbs. With this lower power/output system way a headlight washer system and leveling system are not required. Unfortunately, this results in a mediocre performing headlight. But with our professional know-how and specially developed kit, upgrading is a piece of cake.

Stage 1 - 35-watt Tesla Model S ballast upgrade kit
This Tesla Model S pre-facelift stage 1 kit contains everything you need to swap the underwhelming 25-watt ballasts used in the (EU) Tesla for the good-performing 35-watt version.

We also have a stage 2 kit, which contains 2 brand new and better Aharon HID bi-xenon projectors to replace the OEM Visteon projectors. This kit can be used to further improve the lighting or as a separate upgrade. You can find this kit here.

How to improve the light output of the Tesla Model S

Almost 40% improvement
Want to improve the output by around 38%? The best gain in light output can be achieved by upgrading the ballasts to 35 watts, which gives the system a lot more power and light output. You can check out the difference in the picture with the output shots.

Installing the new 35- watt HID xenon ballast and D1S xenon HID bulbs
Replacing the Osram 25-watt ballast can be done without removing the headlights. Removing some clips from the inner wheel well and 3 screws are the only thing necessary. We have made a video to ensure you are well prepared before replacing them. See tab 'video' for the installation video which shows all the steps to perform this upgrade.

The new ballasts work with D1S HID xenon bulbs instead of the 25-watt D8S bulbs. You can add some basic performing options like the XB35 bulbs or premium high-performance Osram HID bulbs (which we advise you to use).
The D1S bulbs need to be modified a bit to fit the D8S projector. This can even be done with a plier, in the video, we show you how to do it with a drill.

We look forward to brightening your day (not to mention your night)

Quality / Questions / Shipping
This complete Tesla Model S pre-facelift retrofit kit is inspected by our internal quality control and comes with a solid 2-year warranty. It also includes highly rated technical support from your lighting experts at Retrofitlab.com

If you have any questions before purchasing, please refer to our FAQ page or start a chat below. You can also download our free brightpaper on automotive lighting. Nothing beats making an educated decision!

We use premium shipping partners like DPD and UPS. For more info and prices, please see our shipping page.

This is an easy upgrade that complete novices can do, but those with more skills and experience will be quicker. The original ballast and bulb need to be removed which can be done by removing some clips on the inner fender and the new D1S bulb needs to be modified to fit the D8S projector. You can expect the job to take around 1 to 2 hours (both headlights). Please see the 'video' tab for the installation video.

Professional retrofitting
Professional installation
This complete kit has been especially developed to enable retrofitting at home, saving you the cost of installation. However, should you prefer to have the kit installed by a professional? Check out LIST OF DEALERS / INSTALLERS. Please note that, for professional retrofits, you should order your Retrofitlab kit or parts directly from the workshop in question (it saves you money on shipping).

This kit contains 2 35-watt D1S Osram ballasts to convert both headlights. 2 cables from the ballast to the bulb. And 2 D1S xenon HID bulbs.

This kit is compatible with the Tesla Model S 2012-2016 model with the D8S HID xenon headlights.

These products are not ECE or DOT/FMVSS108 approved and must not be used on public roads in any exterior application. Use on public roads will invalidate both the operating license and insurance coverage. You can find more info HERE

The product images shown are for illustration purposes only and may not be an exact representation of the product. Actual products may vary due to changes in manufacturing/product enhancements. You can find more info HERE

The product/kit pictures can differ from what you have received/will receive because we use generic pictures for the kits. Because with all the different options/product changes etc. it's nearly impossible for us to take pictures for all the kits we have, with all the different options and keep them 100% up to date. For example, butyl sealant can be shown in the picture, but with headlights that are originally sealed with butyl, it won't be in the kit.

This customer video is intended to provide a general idea of the output and light pattern from a projector retrofit. It does not necessarily represent the exact setup in this product/kit, it's made with the Optimus TR mini with Osram bulbs

Worldwide Tracked shipping

We are based in Europe (the Netherlands) and we ship worldwide. So shipping to the United States, Australia, Canada etc. is not a problem at all.
All our orders have a track and trace / tracking code, so you can check the progress. The orders are processed by ourselves and send out from our own warehouse.

Delivery Time

We are known for our fast deliveries. All delivery times start when we have received your payment. The products that are in stock will normally be shipped within 1 working day. The shipping time varies based on the destination. Please check the estimated shipping (working) days and costs below. We ship directly from our warehouse in The Netherlands.

Shipping costs

Almost all of our orders will be shipped by tracked parcel shipping. We try to use the best option based on price, delivery speed and service. Most of our shipments are shipped with UPS, sometimes we also use DPD or PostNL.

You can find the shipping costs and shipping times for parcel shipping for inside and outside the EU in the table below.


Zone Countries Price Working days est. delivery
Domestic - UPS The Netherlands € 7,99 1-2
EUR 1 - UPS Belgium, Germany, Luxembourg € 10,98 2-3
EUR 2 - UPS Austria, Bulgaria, Croatia, Czech Republic, Denmark, Estonia, Finland, Greece, France, Hungary, Ireland, Italy, Latvia, Lithuania, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden € 14,98 3-5
EUR 3 - UPS United Kingdom, Norway, Switzerland € 17,49 3-6
Rest of Europe - UPS € 19,98 5
US - UPS  United States € 34,50 / ~$ 38 5
Rest of the World - PostNL   € 35,95 10

Tracking shipments

When you choose parcel shipping, you can follow your shipment. You will receive an e-mail from us with a tracking code as soon as your order leaves our door.


The carriers for parcel shipping choose their own schedule for deliveries. Remember that you need to be present at the delivery address during working days from 9 till 5 in order to receive your order. It remains your responsibility to make arrangements for the way that the order is received at the delivery address. Orders we sent by envelope will arrive, even if you are not at home.

UK prices, shipping and taxes

UK prices / taxes are based on the order amount. For more information please see this FAQ item: UK prices and taxes.

You can find other products in the collection; Tesla Model S pre facelift

Delivery info

Shipped from our warehouse in the Netherlands
delivery is generally within 2-10 days,
depending on your location.

14 days returns

Not the right fit? No worries!

2 year warranty

Quality comes first and our products are designed to last.



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