Based on the measured data of the tunnel lighting, this paper is focusing on the arrangement of measured points in the experiment of tunnel lighting. Through the way of changing the location of measured area and the arrangement of measured points, comparing the simulation from the software DIALUX and the actual measurement in a repetitive region, the best position of measured area and the corresponding layout mode can be found. Analysis shows that, the larger the lamp distance is, the more similar the experiment and simulation results are. Before the experiment, the analysis of the light distribution curve is required, then, the simulation of software can help to find out the best position of lamp interval, measured area and layout mode, in order to ensure the authenticity of the results and to avoid too large or too small lighting evaluation, layout mode must include the maximum measured points and the minimum measured point.