In the first set of hawthorne experiments dealing with lighting what was the main conclusion?

In the first set of Hawthorne experiments, which investigated the effects of lighting on worker productivity, the main conclusion was that changes in the work environment, including variations in lighting, had an impact on productivity. However, researchers found that the mere act of being observed and receiving attention from management significantly boosted worker morale and output, regardless of the actual lighting conditions. This phenomenon highlighted the importance of psychological and social factors in the workplace, leading to the broader understanding of the Hawthorne effect.