As a lighting designer, he brings the knowledge and expertise of quickly expanding an array of available lighting equipment and technology. Because he neither sells lighting equipment, the design is based on an objective understanding of the project goals and budget. While electrical engineers can design a lighting system, that design is most likely based on electrical requirements and code standards but may lack the aesthetic sensitivities to the overall architectural design, this problem never arises as he has the expertise of both the fields. Lighting design requires a technical understanding of electricity, light sources, and vision while also a sensitivity to architectural and aesthetic issues. The end design needs to meet the visual requirements for human eyes performing an endless array of tasks while also illuminating the architectural forms and immediate environment.