The System contributes to CO2 discharge reduction by decreasing electric power usage for lighting as well as the creation of comfortable environments that artificial lighting cannot provide. It has the following characteristics:
1. A simple structure, utilizing mirrors to lead daylight into rooms, which supplies plenty of light economically.
2. High energy-use efficiency because the System simply uses natural light without converting it into electricity, etc.
3. No energy consumption to operate any machinery or equipment because there are no sun-tracking devices.
4. Maintenance-free for significant periods of time because its closed up structure protects itself from most trouble and deterioration.