A lumen figure on a datasheet tells you nothing about whether a road is lit to spec. A photometric design does. We build the road geometry in DIALux, drop in the real luminaire photometry, and calculate the average luminance, uniformity and glare against your road class.
The result is evidence: isolux and luminance plots, the uniformity and TI figures, and the underlying IES / LDT files. It’s what turns ‘we think this works’ into a document an engineer or evaluator can verify.