4x6 LED Headlamps: What the Search Term Means

It is a search and listing phrase rather than a universally standardized headlamp category. The exact meaning depends on the product and its maker's description.

Not necessarily. The phrase is used inconsistently, so verify the actual emitter count and layout on the manufacturer's product page.

Use the model number to locate manufacturer documentation, then compare output modes, beam pattern, runtime and power source. Avoid assuming specifications from the phrase alone.

LED count alone does not establish usable brightness. Optics, drive settings and beam design also affect the light delivered to the task.