Spot off-road lights concentrate light ahead for reach. Flood lights spread it across a wider nearby area. Combo lights combine a focused forward zone with broader coverage. Choose according to the area you need to illuminate, then compare the offered lamp’s beam map, output and control arrangement.
For importers and distributors, that choice also defines the product range: a distance option, an area-lighting option, or a combined pattern for buyers with limited mounting space. The DXZ off-road lighting range includes these different roles. The purchasing task is to turn the beam name into a specification a supplier can quote and a sample can demonstrate.
What is the difference between spot, flood and combo beams?
| Beam pattern | Choose it when the main requirement is… | What should the sample demonstrate? |
|---|---|---|
| Spot | Concentrated illumination farther along a defined forward line | Useful intensity in the target direction, with enough surrounding coverage from the rest of the lighting system |
| Flood | A wider view of nearby ground or a work area | Coverage across the required width and distance, including the edges of the task |
| Combo | Forward reach and wider context from the same mounting position | A useful central zone and side coverage, with a workable transition between them |
The width and height both matter. A beam that spreads widely left to right can still have a controlled vertical shape. When a supplier provides an angle, ask whether it describes horizontal spread, vertical spread or both, and how the beam edge was defined. A single angle gives less information than a labelled distribution map.
Manufacturers also use different combinations. Diode Dynamics’ optic guide describes its combo as driving plus flood optics. Baja Designs’ pattern guide describes driving plus spot optics. For sourcing, specify the required distribution alongside the word “combo.”
Choosing spot or flood for the target area
Choose spot when the main gap is forward reach along an open sightline. Choose flood when the task needs a wider view close to the vehicle, such as a loading area or nearby terrain. The position of that target area should guide the beam and its mounting direction.
A forward spot is useful when existing lighting already provides nearby context and the missing area is farther ahead. Review the center of the beam at the intended distance, then check how much of the area to either side remains visible. Record the area that needs additional light when presenting the spot option to customers.
For a flood, define the area in practical terms: the ground beside a parked vehicle, the rear loading space, or the width of a close off-road section. Ask for readings or a beam map across that area. A bright center alone gives little information about the edges where tools, cargo or terrain may need to be seen.
Route layout and mounting position deserve a separate review once the beam role is clear. The trail-lighting guide covers distance, corners and changing trail conditions in more detail.
When does a combo beam make sense?
A combo is a practical starting point when one available mounting position must provide both a concentrated forward zone and wider coverage. Separate spot and flood lamps give the installer more freedom to aim each zone and, with suitable wiring, operate them independently.
Consider the control requirement before selecting the hardware. If the buyer wants close-area lighting while parked and distance lighting during off-road travel, record those as separate operating modes. A fixed combo pattern may switch both zones together. The supplier should confirm whether the offered lamp and harness support the requested modes.
Mounting space changes the choice too. One combo assembly can simplify a layout with limited room. Separate lamps need space for additional brackets and cables, but allow each beam to point at its own target. Compare the complete arrangement, including the adjustment range and accessible mounting points.
For a compact combined pattern, the DXZ BF3-A6por combo-beam kit lists a Spot + Flood beam and a set with wiring harness. It is a starting point for a configuration discussion; include any requirement for separate beam control in that discussion.
Which specifications make a beam comparison useful?
Compare distribution, directional intensity and illuminance at the target area. Lumens describe total light output; candela describes intensity in a direction; lux describes light arriving at a surface. Each answers a different purchasing question, as explained in the DXZ guide to lumens, candela and lux.
A beam-distance figure needs its illuminance threshold. “1 lux at 100 m” and a distance quoted at 0.25 lux use different endpoints. Under the inverse-square relationship, the same directional intensity reaches 0.25 lux at twice the distance at which it reaches 1 lux. This is a calculation for the same source and measurement direction using the relationship described by NIST.
For a quote comparison, put the threshold next to the distance. Also record whether the result represents one lamp or a pair, the light color, supply voltage and operating state. Those fields prevent a pair’s result or a different color mode from being compared with a single white lamp.
Then look beyond the peak. For a spot, examine intensity in the target direction and the adjacent coverage. For a flood, examine width at the working distance and readings across the task. For a combo, examine both regions and the transition. The automotive LED specification guide covers measured versus theoretical output and the other electrical comparison fields.
DXZ spot and flood versions: a specification example
The PY35 family illustrates why a purchase order should identify the exact beam version. Its Spot and Flood listings share a 3.5-inch round form, 9–36 V DC input and 30 W rated power at 12 V. Their listed white-light output differs.
| Current DXZ listing | Beam | Rated power at 12 V | Listed measured white output per lamp |
|---|---|---|---|
| PY35-1-Spot | Spot | 30 W | 2488 lm |
| PY35-1-Flood | Flood | 30 W | 1836 lm |
For a reach comparison, use beam evidence for the same color and lamp quantity. The Flood listing gives a white-light test point of 1 lux at 82 m; request the corresponding white-light distribution for the Spot when evaluating forward reach.
The same discipline helps with reorder control. Put the beam suffix, color mode and agreed kit contents on the specification sheet. A matching housing size or power figure leaves the optical version unresolved.
How should a distributor approve a beam sample?
Agree on the target area before the sample check. Mark the forward distance and width that matter to the buyer, then compare the lamps with the same supply, operating mode and test geometry. Keep the model and beam suffix attached to every result so the approved sample can be matched to the order.
For a useful comparison record:
- Record lamp quantity, color mode, supply voltage and warm-up state.
- Use the same mounting height, aim and marked observation positions for the comparison.
- Record readings at the center and relevant side positions, with their distances and units.
- Keep camera position and manual exposure settings consistent when taking comparison photos.
- Check the intended control modes and document the supplied brackets, connectors and harness.
A wall pattern helps compare shape. An installed sample check shows where that shape falls relative to the vehicle and task. Keep both records when the buying decision depends on mounting, and write the acceptance requirement around the area the customer needs illuminated.
For a DXZ quotation, send the required beam role, target distance and width, mounting space, supply voltage, color mode and order quantity. Add any harness or independent-control requirement. Contact DXZ with those details to narrow the sample choice and agree on the configuration for the order.
Review the DXZ off-road light test records for examples of report dates, electrical inputs and beam-map settings.