Purelux Driving lights Panther S540

The bestselling bar · Gen3 · PowerBoost®

Panther S540

The 54-centimetre bar at the top of its class year after year: 15,238 measured lumens and 645 metres in PowerBoost®, an E-approved road mode at the press of a button, and a frameless lens with a two-colour parking light.

4.8 · 426 reviews

Fitting in short

  1. Mount: end or bottom legs
  2. Wire: relay harness, DTP
  3. Trigger: high beam or XBB
  4. Mode: button on the end
EN valostore.comBuy at Valostore Fitting guide

Opens the Panther S540 page at valostore.com — the market chosen in the top bar.

Purelux Panther S540
Purelux Panther S540
15,238 lm
measured, PowerBoost®
645 m
@ 1 lux, PowerBoost®
Ref. 30
E-approved road mode
36 × 6 W
LEDs
IP69K
sealed
417
reviews · 4.8

Fitting guide

An evening in the garage.

Bracket, harness, trigger, aim. Here is the whole job in order — most owners say it took them an hour or two.

Installation manual (PDF)
  1. 01

    Pick the spot, then the bracket

    Under the number plate with the EU-plate bracket, in the grille, or on a bull bar with a tube mount. The S540 comes with end legs and width-adjustable bottom legs, and the panel has ready places for stabilizer bars.

  2. 02

    Use the relay harness

    Run the Pro Serie relay harness from the battery: red to +, black to the chassis, the fused relay next to the battery. The light's DTP connector clicks straight into it.

  3. 03

    Take the trigger from the high beam

    The harness's thin trigger wire taps the car's high-beam feed, so the light follows your stalk. On a halogen car that is one connector.

  4. 04

    LED headlights or CAN bus? Use XBB

    Newer cars switch the high beam over the CAN bus. Plug the XBB Dongle into the OBD port and the PowerUnit relay into the Dualrelay harness: it reads the high-beam signal wirelessly, no cutting into looms.

  5. 05

    Wire the parking light

    The yellow (orange) and white wires are the two-colour parking light. Connect one of them to the car's position-light feed — or both to a switch and choose by mood.

  6. 06

    Choose the mode

    Press the button on the end of the bar to switch between road mode and PowerBoost®. The last mode is remembered, so a road car stays legal without thinking about it.

  7. 07

    Aim it

    On a flat stretch at night, adjust the light so the top edge of the beam sits level with the car's own high beam. Tighten the stabilizer bars so it stays there on gravel.

  8. 08

    Stay inside the rules

    Under ECE R48 the combined reference number of all high beams on a car — the originals included — may not exceed 100. This light is Ref. 30: check the marking on your headlamps before adding more.

Keeping it like new

  • Wash the lens, don't scrape it

    Polycarbonate scratches. Soak road salt off with water before wiping, and never use an ice scraper on the lens.

  • Grease the connector

    A dab of dielectric grease on the DTP pins keeps winter out of the connector for years.

  • Check the bolts after the first week

    Brackets settle. One turn on the stabilizer and foot bolts after the first 500 km stops the rattle before it starts.

  • PowerBoost is for off-road

    Road-traffic approval covers the road mode only. Switch to PowerBoost on forest roads and closed tracks.

Owner tips

  • Under the plate or flush

    The adjustable bracket lets the bar sit flush in the grille opening on many cars. Measure the gap between parking sensors first.

  • Road mode is enough

    Several owners say the E-approved mode covers normal driving; PowerBoost is for the forest road.

  • Stone guard

    A model-specific Panther S540 guard protects the frameless lens on gravel.

  • Adaptive headlights

    Works alongside adaptive LED systems — owners run it on an XC60 and a Passat Alltrack.

Measured, not promised

The numbers from the lab.

Every Purelux is measured in Valostore's light laboratory in Oulu: output, range at 1 and 0.25 lux, power draw and colour temperature. We publish what we measured, even when it is lower than the box.

Declared by the manufacturer16,300 lm
Measured maximum15,238 lm

Measured output is 7 % below the manufacturer's declared figure — and that is the number we publish. Colour temperature 5,050 K measured; range 645 m at 1 lux and 1,290 m at 0.25 lux.

Modes · output, range and power — measured

PowerBoost®15,238 lm645 m @ 1 lux188 W
Road mode (E)4,300 lm340 m @ 1 lux38 W
Parking light—orange or white4 W

Range is the distance at which the beam still delivers 1 lux (roughly a full moon) or 0.25 lux. Measured at 24 V with a clean lens; full lab curves are available to professional buyers on request.

Purelux Panther S540 under the number plate of a Volvo V90 Cross Country
Under the plate of a V90 Cross Country

Why Panther S540

Its manufacturer's most popular product. For a reason.

The Panther series combines a combination beam optimised for road traffic with the kind of output that used to need an off-road light. Gen3 added dark optics around the parking light, an easier PowerBoost button and a coated body that shrugs off salt.

The beam is the point: wide enough to light both verges, with a centre that reaches 645 metres at one lux in PowerBoost®. In road mode it is a legal Ref. 30 light that works alongside modern adaptive headlamps without blinding anyone.

Owners call it the easiest light they have ever fitted. The EU-plate bracket, the relay harness and — for CAN-bus cars — the XBB kit turn the job into an hour.

In the box · single light

  • Purelux Panther S540 Gen3
  • 2 × width-adjustable bottom legs
  • 2 × end legs
  • Power-cable counterpart
  • Connection and installation instructions (FI/SE/NO/DK/EN)

Complete sets with bracket, relay harness and stabilizers are sold at Valostore — see the options on the store page.

Works with Panther S540

68 parts that fit this light.

Guards cut for this lens, brackets for its feet, and the harnesses, relays and switches that every Purelux shares. The whole catalogue, filtered by light, is on the brand page.

Brackets & mounting 18

All 18 in the catalogue

Wiring & switches 50

All 50 in the catalogue

Technical details

Specifications

Documents

Measured figures are Valostore's; declared figures are the manufacturer's. Dimensions are for the current generation.

Light output
16,300 lm declared · 15,238 lm measured (PowerBoost®) · 4,300 lm road mode
Range
645 m @ 1 lux · 1,290 m @ 0.25 lux (PowerBoost®) · 340 m @ 1 lux road mode
Power
188 W PowerBoost® · 38 W road mode · 4 W parking — measured @ 24 V
Colour temperature
5,000 K stated · 5,050 K measured
LEDs
36 × 6 W
Reference number
30 (road mode)
Approvals
ECE R10, R7, R112 — road approval does not cover PowerBoost®
Voltage
9–32 V DC
Connector
DTP-2 + separate parking-light wires · cable 50 cm
Dimensions
540 × 66 × 70 mm · 78 mm with end legs
Weight
2,800 g
Protection
IP69K
Warranty
24 months
Product code
HS18816

Watch

On the road, and in the garage.

  • Panther S540 test drive (Finnish)

  • Fitting the S540 on a Volvo XC60 (Swedish)

  • Purelux — Clear your horizon

Videos load from YouTube only when you press play.

From people who fitted one

Owners on the Panther S540

4.8426 reviews across Valostore's stores
  • “Excellent light in its class — reaches far and lights the verges too. Works well with the XC60's adaptive lights. And it is the easiest thing in the world to install.”
    Jani S.Finland · Sep 2026
  • “Really easy to install. This kit worked well on a 2018 Passat Alltrack. Just the right amount of light; it does not dazzle you at signs.”
    Johan E.Sweden · Sep 2026
  • “Amazing light, highly recommended. Delivery to Slovakia took six working days.”
    Filip K.International · Sep 2026
  • “Very bright light from this bar. Fitting went smoothly with the accessories I ordered; XBB made the installation very simple.”
    Karl C.Sweden · Jul 2026
  • “Wonderful how easy installation has become. The light is completely enough for normal use in traffic.”
    Petteri V.Finland · Aug 2026
  • “High quality in both build and light, fast and secure delivery, quick and complete answers after purchase.”
    Christoph P.International · Apr 2026

Verified-purchase reviews collected by Valostore after delivery. Names shortened; quotes translated to English, the originals are on the store pages.

More light, less light, different job?

The other seven.

Official partner

Buy the Panther S540 from Valostore.

Single lights and complete sets with bracket and harness, in your language and currency, with the lab behind every number.