The short answer: “auxiliary light” (or “aux light”) means any extra light added to your bike. A fog light and a driving light are two types of aux light. A fog light throws a low, wide beam for bad weather. A driving light throws a narrow beam far down the road for clear, dark nights.
Walk into any accessory market and you’ll hear these three names used as if they mean the same thing. They don’t, and buying the wrong type is how riders end up with a bright light that still leaves them crawling through fog. Here’s how to tell them apart and choose the right one for your rides.
Fog light vs aux light vs driving light at a glance
| Fog light | Driving light | Auxiliary (aux) light | |
|---|---|---|---|
| What it is | A type of aux light for poor visibility | A type of aux light for distance | Any extra light added to the bike |
| Beam | Low, wide and close to the road | Narrow and long | Depends on the light |
| Best for | Fog, heavy rain, dust, road edges | Empty, unlit highways | Depends on the light |
| Mounted | Low, below the headlight | Usually around headlight height or a little lower | Crash guard, fork or fender mounts |
| Weakness | Doesn’t reach far | Reflects back in fog; can dazzle oncoming riders | The name tells you nothing about the beam |
What is a fog light?
A fog light is built to light the road right in front of you when the air is full of water or dust. As Rider Magazine puts it, the idea is a low horizontal beam that’s wide and close to the road surface, so you can see the road edge without blinding oncoming traffic.
The reason is simple. Light aimed high hits the fog in front of you and bounces back into your eyes. That’s the “white wall” every winter rider in North India knows. A fog light stays under most of that, trading distance for width.
What is an auxiliary light (aux light)?
“Auxiliary” just means additional. Any light you add to the bike’s stock lighting is an aux light, whatever its beam. So every fog light on a motorcycle is an aux light, but not every aux light is a fog light.
That’s why “aux light” alone doesn’t tell you enough to buy one. Before you pay, ask two questions: what shape is the beam, and where is it meant to be mounted?
What is a driving light?
A driving light is for seeing further. Rider Magazine describes it as a narrow beam thrown farther down the road than the headlight, which gives you more time to react to potholes and debris. Wikipedia’s automotive lighting article describes these as auxiliary high beams, common where there are long stretches of unlit road.
Treat a driving light like your high beam: great on an empty highway, and something to switch off when traffic comes towards you.
Does colour make it a fog light?
No. A yellow light aimed high is still a badly aimed light. Beam shape and aim come first. Colour comes second.
Many riders do prefer yellow (around 3000K) in fog and rain because it feels easier on the eyes, and white (around 6000K) on clear roads. Sources disagree on how much of yellow’s advantage is measurable, so we’d treat it as a real comfort benefit, not magic.
Which one do you need for Indian roads?
| How you ride | What to look for |
|---|---|
| Winter mornings, North India fog | A low, wide beam with a yellow option |
| City commute with broken streetlights | A compact light with a low, wide beam |
| Night runs on unlit highways | A long beam you can switch off for traffic |
| Touring through all of the above, including ghats | A dual-mode light: yellow low beam, white high beam |
Most riders in India meet more than one of these on a single trip, which is why dual-mode aux lights are popular here: you don’t have to choose one beam for every road.
Where Lumevo lights fit
Our Lights Pro range isn’t a fog-only lamp or a distance-only lamp. It’s a dual-mode aux light. You can choose it with a yellow low beam for bad weather and a white high beam for clear roads, on a switch, so there’s no filter to snap on at the roadside.
| Lights Pro X1 Plus | Lights Pro X2 Plus | |
|---|---|---|
| Brightness | 10,000 lux at 12 ft | 18,000 lux at 12 ft |
| Power (each light) | 25W | 45W |
| Weight (each light) | 85 g | 220 g |
| Waterproofing | IP68 | IP68 |
| Colour options | 3000K yellow, 4300K warm white, 6000K white | 3000K yellow, 4300K warm white, 6000K white |
| Warranty | 1 year* | 2 years* |
| Suits | City riding and weekend runs | Long-distance touring |
*Warranty terms are on each product page. Still deciding? Read our X1 Plus vs X2 Plus comparison.
How to mount and use aux lights without blinding anyone
- Mount low. Fit them below the headlight, on the crash guard or fork, and keep them rigid so vibration doesn’t change the aim.
- Aim down. Park facing a wall at night and check that the beam’s top edge sits no higher than your low beam.
- Check your bike’s electrics. Rider Magazine warns that small bikes may have limited charging capacity. A pair of X1 Plus draws 50W and a pair of X2 Plus draws 90W, so tell us your model before you buy if you’re unsure.
- Be considerate. Switch to low or off when traffic comes towards you and in the city. Bright lights only make you safer if the rider coming the other way can still see.
Are aux lights legal in India?
This is the one question we won’t give you a one-line answer to. Published guides disagree, and enforcement varies by state. We’re not lawyers, so check with your local RTO or traffic police. Mounting low, aiming down, and switching off in traffic and in clear conditions keeps you on the considerate side either way.
Frequently asked questions
Are fog lights and aux lights the same thing?
Not quite. An aux light is any extra light added to a vehicle. A fog light is one type of aux light, with a low, wide beam for poor visibility.
Can I use a driving light in fog?
It’s usually a poor choice. A long beam aimed further up the road tends to reflect off the fog and back at you. Use a low, wide beam and slow down.
Is yellow or white better for a bike fog light?
Many riders prefer yellow in fog and rain, and white on clear roads for distance. Beam shape and aim matter more than colour. A dual-mode light lets you use both.
Where should aux lights be mounted on a motorcycle?
Below the headlight, usually on the crash guard or fork, with the beam aimed downwards so it doesn’t dazzle oncoming riders.
Do Lumevo lights need wire cutting to install?
No. Lumevo lights are plug and play, and you can choose a wired or, on the X2 Plus, a wireless harness. See our installation guide for the steps.
