What Should You Look for in Motorcycle Lights for Night Riding?

Why add auxiliary lights to a factory headlight?

A road headlamp uses low beam to illuminate the road while controlling light toward oncoming traffic. High beam adds illumination farther ahead on an open road. Regulations shape where the light goes and how intense it can be in different directions.

Motorcycle auxiliary lights add coverage for a particular route. On a long rural straight, a concentrated beam puts more light into the distance. On a narrow lane bordered by hedges, a wider pattern illuminates the verge. A slow gravel section benefits from light spread across the track, where ruts and loose stones sit on either side of the wheel path.

The lens and reflector determine that distribution. A multi-mode lamp lets the rider change the additional illumination as the journey moves between open road, traffic and rough terrain.

What is the difference between spot, flood and combo beams?

Spot: concentrated light along the road

A spot beam concentrates light into a narrow angle. This raises the intensity toward the center and gives the beam its reach. On a straight, unlit road, the factory headlight lights the near lane while the spot adds illumination farther ahead. Riders comparing motorcycle spotlights for rural touring will find this concentrated center useful.

Flood: a wider view of the surface

A flood beam distributes light across a broader angle. It lights more of the nearby road and its shoulders. On gravel, that spread shows the width of a rut, the position of a stone and the edge of the track. An even transition into the middle distance helps the rider follow surface detail as the motorcycle moves forward.

Combo: a long center surrounded by wider coverage

A combo beam combines a concentrated center with a wider surrounding pattern. JiuGuang recommends it for mixed night touring: the center adds light down a straight, while the surrounding coverage illuminates the lane edges and the entrance to a bend.

How much difference does the beam angle make?

Consider two simplified beams with full horizontal angles of 10° and 40°. At 50 m, their geometric widths are about 8.7 m and 36.4 m. The calculation is width = 2 × distance × tan(half the beam angle).

With the same total light output, the narrow beam concentrates more light in its central direction; the broad beam shares it across more of the scene. The angles above illustrate that geometry. A lamp's illuminance map shows the actual light levels within its coverage.

Which pattern suits your night-riding route?

On unlit rural straights, motorcycle driving lights with spot coverage add reach. Choose combo when the verge also needs illumination. Use low beam around other traffic and reserve the long-range high-beam setting for clear stretches.

On winding country lanes or mountain roads, choose combo coverage. The bend entrance shifts away from the center of the view, and a broader surrounding pattern puts light across more of the lane edges. A narrow central beam directs most of its light down the straight-ahead line.

For slow gravel and trail riding, favor a broad, even flood pattern. Motorcycle off road lights with this distribution illuminate the wheel path and the ground beside it, showing surface detail across the track. This wider view is useful where a rut crosses the route or the track narrows.

For adventure motorcycle lights used on a trip that includes all three, choose a multi-mode setup. Combo serves the mixed rural sections, wider coverage suits slow rough terrain, and low beam serves the road sections with traffic.

What does that coverage look like on a forest ride?

JiuGuang's D035 (EVO35) field footage shows the lighting from outside the motorcycle and from the rider's viewpoint. In the forest sequences, light reaches along the track and onto the trees and vegetation beside it. Watch the bright center ahead, then the ground and foliage at either edge: these are the areas served by spot, flood and combo coverage.

Around 0:04-0:11, the clip shows forest-road lighting and the view from the motorcycle. Around 0:12-0:18, it shows yellow covers being fitted and yellow-toned illumination along a misty track. Open the full 19-second field video on YouTube.

How do you read a beam map and a 1-lux distance?

In the specifications for LED motorcycle auxiliary lights, lumens describe total light output. Candela describes intensity in a particular direction. Lux measures the illuminance reaching a surface; 1 lux equals 1 lumen per square meter. A beam map plots areas receiving the same illuminance, so it connects the output figures to the illuminated view.

In this D035-6 (EVO35) catalog map, the distance axis runs forward from the lamp, and the lateral axis shows positions on either side of the center. The dark-blue boundary marks 1 lux. The inner regions show 2, 5, 10, 25 and 50 lux. The plot's colors distinguish those illuminance levels.

The 1-lux contour reaches 305 m along the center. Nearer the lamp, the contours extend farther to either side, showing a wider area of illumination. For a straight-road comparison, follow a contour down the center. For a winding-road comparison, look at its width at the same distance. Comparing the same lux level keeps the two lamps on a common basis.

A worked example: 1 lux at 305 m

For a clear-air, far-field calculation with the target facing the lamp, illuminance follows E = I ÷ d²: illuminance equals directional intensity divided by distance squared. Starting with 1 lux at 305 m gives an equivalent intensity of 305² = 93,025 cd.

Doubling the distance reduces the calculated illuminance to one quarter. This explains how light levels change along the beam. The map supplies the sideways information: a strong center for reach, with contours spreading out to show the coverage around it. Read both dimensions when choosing between straight-road and winding-road lighting.

What light color works for rain and fog?

For clear nights, JiuGuang recommends white main lighting for general road illumination. For rain and fog, we recommend amber or yellow-toned auxiliary light with a low, controlled spread over the nearby road. In poor weather, put the light across the lane boundary and the surface ahead.

The yellow-toned beams in the closing D035 (EVO35) field footage illuminate the track through mist. Light reaches the surface ahead of the motorcycle and the vegetation beside it, showing the near-road coverage JiuGuang recommends for fog.

Yellow lighting has a long history in automotive fog lamps. Selective yellow filters the blue-violet part of the spectrum. In a wet-weather setup, the color and the road-level distribution work together. Riders looking for motorcycle fog lights should choose that combination, with an approved fog-light function for public-road use.

JiuGuang's matching yellow covers give the main light a yellow tone, as the D040-7TJ (ORI45) mode illustration below shows. D035-6 (EVO35) and D040-7TJ (ORI45) also have amber DRLs for daytime use; their main beams provide the road illumination.

Which JiuGuang auxiliary lights match these needs?

D035-6 (EVO35), D040-7TJ (ORI45) and 954D-H are JiuGuang options for these night-riding uses. All three offer low and high modes alongside a combined mode, plus matching yellow-cover options. The table gives power and distance per lamp, with Raw Lumens stated per pair.

D035-6 (EVO35) for a mix of rural straights and winding roads

D035-6 (EVO35) is our recommendation for a touring route that regularly switches between open straights and narrower country lanes. Its high, low and combo modes serve those changes, with a stated 305 m single-lamp 1-lux distance. The 3.5-inch lamp also offers amber DRL and matching covers for a yellow-toned main-light setup.

D040-7TJ (ORI45) for touring with an emphasis on low-beam use

D040-7TJ (ORI45) provides a listed 90 m low-beam 1-lux distance, alongside the 320 m distance in its specifications. It is our larger, 4.5-inch option for touring that includes regular stretches in low beam and open sections using the other modes. Its 13,517 raw lumens per pair are the highest listed total in this comparison. White dynamic start and amber DRL add its distinctive lighting appearance.

954D-H for long, dark straights in a compact format

For a route dominated by open, unlit straights, choose the compact 954D-H for its long-range capability. It has a stated 600 m single-lamp 1-lux distance in a nominal 3-inch housing, with low, high and combo high modes. The catalog lists 40 W / 60 W per lamp and 6000 K / 3500 K options; matching yellow covers add a yellow-toned configuration for wet-weather riding.

The distance and lumen columns answer different selection questions. D040-7TJ (ORI45) has the highest listed raw lumen total here; 954D-H has the longest stated 1-lux reach. Use the distance column to compare centerline reach and the beam map to understand the area surrounding that center.

These models are part of the JiuGuang motorcycle auxiliary lighting range. All three have die-cast aluminum housings and listed IP68 enclosure protection for outdoor use.

For public-road riding, choose the ECE/E-mark-approved lighting configuration. JiuGuang supplies CE documentation and ECE/E-mark approval information for applicable configurations, identifying the model and lighting function covered.

What should your final choice look like?

A night-riding setup should put light into the parts of the route you use:

• Long rural straights: spot coverage or a combo with a concentrated center.
• Winding lanes and mountain roads: combo coverage that lights the lane edges.
• Slow gravel and trails: an even flood pattern across the nearby surface.
• Rain and fog: JiuGuang's amber or yellow-toned recommendation with controlled road-level illumination.

D035-6 (EVO35) serves mixed rural touring, D040-7TJ (ORI45) offers the larger multi-mode option with a listed low-beam distance, and 954D-H suits the rider seeking long-range illumination in a compact housing. Compare the JiuGuang lighting options by that route and coverage, using 1-lux distance for reach and the contours of the beam map for spread.