Office is the place where most people works and studies. The lighting conditions in offices are quite important to people who are working or studying in. However, the viewing conditions vary from office to office. The artificial lights used are different, with the types from tungsten to fluorescent. On the other hand, the natural daylight is another significant factor which can vary the indoor lighting. This study held at Leeds aims to find the differences between offices and to generate a standard office lighting and indoor daylight.