This thesis is a human-centered concept development in lighting. The purpose of the work was to show the possibility of how lighting could be used and how lighting is applied to have the desired effect during night driving. The purpose of the customer was a user-friendly machine. The goal was to deliver knowledge in lighting to Väderstad regarding their agricultural machines. There were three product groups, all of which were carefully examined. Ideas in design-, user- and indication-lighting were presented. The question that was answered in the essay was: What are the most important lighting functions for farmers on seed drills from Väderstad with a focus on night driving? The methodology was taken from two engineering design processes...