Devil eye — or demon eye — projectors are a decorative lighting modification fitted behind a headlight lens, and in every market we ship to they should be treated as a show, display and off-road product rather than a road-legal one. Two independent rules catch them. First, colour: red light shown to the front of a vehicle is prohibited under the road traffic rules of the US, the EU and the UK, and Australia, because red to the front conflicts with the universal convention that red means the rear of a vehicle. Second, certification: a headlamp is type-approved or certified as a complete unit — under FMVSS 108 in the US, UNECE R48 and R112/R149 in Europe, and ADR 13/00 in Australia — and modifying the inside of that unit generally invalidates the approval it was granted.
Why we are publishing this instead of a marketing page
Almost every listing for this category says "universal fit" and stops there. We would rather tell you where these can and cannot be used, because the failure modes are a failed inspection, a defect notice, an insurance problem after an incident, or a fine — and all of them are avoidable if you know the rules before you fit them.
None of what follows is legal advice. Vehicle lighting rules are national, and in the US and Australia they are also state-level. Check the rules that apply where your vehicle is registered.
Rule one: the colour of light shown to the front
This is the rule that catches devil eyes, and it is remarkably consistent internationally. Road lighting conventions reserve red for the rear of a vehicle and require forward-facing lamps to be white or, for indicators and certain markers, amber. A red light visible from the front tells other drivers they are looking at the back of a vehicle — which is precisely the misreading that causes collisions at night.
Consequently, in the US, across the UK and EU, and in Australia, showing red light to the front on a public road is prohibited, whether it comes from a certified lamp or a decorative one behind the lens. The device's brightness is not the test; visibility of the colour from the front is.
Rule two: modified headlamps and type approval
United States — FMVSS 108
Federal Motor Vehicle Safety Standard 108 governs lamps, reflective devices and associated equipment. The key concept for aftermarket buyers is that compliance attaches to a complete certified headlamp assembly — reflector, lens, source and mounting as a tested unit — not to a component dropped into an existing housing. NHTSA has repeatedly made this point in the closely related context of LED retrofit bulbs sold for halogen sockets, which do not comply with FMVSS 108 even when marketed as "DOT approved". Placing a decorative light source inside a certified assembly puts you outside what that assembly was certified as. Roadworthiness and inspection enforcement is then a state matter, and inspection regimes vary widely.
Europe and the UK — UNECE R48, R112 and R149
Two regulations do the work. UNECE Regulation 48 governs the installation of lighting and light-signalling devices on vehicles — what may be fitted, where, in what colour, and in what combination. Regulation 112 covered the approval of headlamps themselves; since 14 November 2021 R149 has replaced it for new type approvals. A lamp that passes gains an E-mark — a circled E with a country number — and that approval is valid across every country in the E-mark system. The corollary is the important bit: an approval is granted to the lamp as tested. Alter what is inside it and the approval no longer describes the object on your car. Individual member states then handle roadworthiness testing — the MOT in the UK, the TÜV in Germany, the contrôle technique in France — and modified lighting is a routine failure item.
Australia — ADR 13/00 and state roadworthiness
Australian Design Rule 13/00 prescribes the number and installation of lighting and light-signalling devices on vehicles other than L-group. Accessory lighting that is not ADR-compliant can legally be sold in Australia as an accessory — but that is a different question from whether a vehicle fitted with it passes inspection. State rules vary, and non-compliant lighting is a common cause of defect notices. (As an indication of how specific the ADRs get: vehicles with headlamps producing more than 2,000 lumens per headlamp require automatic self-levelling.)
| Market | Governing rule | Practical position on red front-facing decorative lighting |
|---|---|---|
| United States | FMVSS 108 (federal) + state inspection codes | Not road legal. Compliance attaches to the complete certified assembly; red to the front is separately prohibited. |
| EU and UK | UNECE R48 (installation), R112 / R149 (headlamp approval) | Not road legal. Modifying an approved lamp invalidates its E-mark approval; red to the front is prohibited. |
| Australia | ADR 13/00 + state roadworthy rules | Not road legal. Legal to sell as an accessory; a fitted vehicle is likely to attract a defect notice. |
| Shows, private land, display | No road traffic rules apply | This is where these belong. |
So where do they belong?
Genuinely: shows, meets, static display, photography, private land and off-road use. That is not a euphemism — it is a large and legitimate market. A car that is trailered to a show, or driven on private ground, or photographed for content, is not subject to road lighting rules while it is there.
Two practical points make this workable. The Iris units are switched by a wireless remote from up to about 30 ft, so they can be turned off before the vehicle is driven on a public road without opening the bonnet. And the control module sits in a waterproof housing with a sealed all-weather harness, so a set can stay permanently mounted and simply remain off on the road.
We will not tell you that switching them off makes a permanent modification compliant — in some jurisdictions the presence of the equipment is itself the issue at inspection time. But a remote-switched, permanently mounted, weather-sealed set is the most practical arrangement for a car that lives between a garage and a show field.
Solis Iris Animated Devil Eye Headlights — Set of 2
A pair of animated 3D iris projector units with a wireless remote, waterproof control module and sealed all-weather harness.
$69.95 — view product →
Fitting notes
- Universal-fit brackets suit cars and motorcycles with a round projector housing. Check yours before ordering — the shape of the housing decides the fit, not the make of the car.
- Opening a sealed headlight unit is the real job. Most modern units are heat-sealed, and reassembly without a proper reseal is how condensation gets in. If you are not confident, this is a workshop task.
- Do not tap into the headlamp circuit. Use the supplied module and a switched accessory feed, so the decorative lighting is entirely independent of the certified lamp.
- Keep the original parts. Reversibility is what makes an inspection or a resale straightforward.
- Check your insurer. Undeclared modifications are a common cause of claim disputes, and lighting is one of the categories insurers explicitly ask about.
What the product is, plainly
A set of two projector units with an animated 3D iris design that glows through the headlight lens and reads as depth rather than as a decal; a wireless remote that switches modes and turns the pair on and off from up to 30 ft; a waterproof control module managing power and lighting patterns; sealed all-weather cabling; and universal-fit brackets for round projector housings. It is a striking modification and it is sold for show, display and off-road use.
It sits in the Automotive Lighting collection.
Frequently asked questions
Are devil eye headlights legal on the road?
In the US, the UK and EU, and Australia, they should be treated as not road legal. Red light shown to the front of a vehicle is prohibited under road traffic rules in all of those markets, and modifying the inside of a certified or type-approved headlamp assembly invalidates the approval it was granted.
Does it help if I switch them off while driving?
It is the most practical arrangement — the Iris kit is remote-switched from up to 30 ft — but it is not a guarantee of compliance. In some jurisdictions the presence of non-compliant equipment is itself an inspection issue, regardless of whether it is switched on.
What does FMVSS 108 actually require?
It governs lamps, reflective devices and associated equipment, and compliance attaches to the complete certified headlamp assembly rather than to a component fitted inside one. NHTSA has made the same point about LED retrofit bulbs sold as 'DOT approved' for halogen housings.
What is an E-mark, and does modifying a lamp void it?
An E-mark is a UNECE type approval — a circled E with a country number — granted to a lamp as tested and valid across every country in the E-mark system. Approval describes the lamp as it was submitted, so altering its internals means the approval no longer describes the part on your vehicle.
Can I legally buy them in Australia?
Yes. Accessory lighting that is not ADR-compliant can be sold in Australia as an accessory. That is separate from whether a vehicle fitted with it passes a state roadworthy inspection, which it is unlikely to.
Where can I use them?
Shows, meets, static display, photography, private land and off-road use. The units are weather-sealed for permanent mounting, so a set can stay fitted and simply remain switched off on public roads.
Sources
- NHTSA — Federal Motor Vehicle Safety Standards and interpretations
- UNECE Regulation No. 48 — installation of lighting and light-signalling devices (EUR-Lex)
- Australian Government — Current Australian Design Rules (third edition)
- Vehicle Standard (Australian Design Rule 13/00 — Installation of Lighting and Light Signalling Devices)
Written by the Solis Fortune editorial team. Specifications quoted are the published manufacturer figures for the products linked above; where a supplier publishes no figure we say so rather than estimate one. Regulatory summaries are general information, not legal advice — check the rules that apply where you live before you buy.