Urban lighting engineering solution-the choice of lighting load, the lighting load should be classified according to the requirements for power supply reliability and the degree of political and economic losses or impacts caused by interruption of power supply, and should meet the following requirements:

1) It shall be a first-class load when one of the following conditions is met.

①　When the interruption of power supply will cause personal injury or death.

②　Shenzhen Totiwo believes that the interruption of power supply will cause major economic losses. For example, the work lighting of important workshops and the lighting of the command center of large enterprises; the lighting of the main offices of the national, provincial, and municipal governments at all levels; the lighting of the waiting rooms of transportation facilities such as super-large railway stations, border stations, and seaport passenger stations; ticket offices Lighting, etc.; lighting for competition halls and squares of large-scale sports buildings; lighting for main channels of senior guest rooms, banquet halls, restaurants, and entertainment venues of four-star and five-star hotels; lighting and collection of parts of business halls of key department stores in provinces and municipalities directly under the Central Government Local lighting; provincial and municipal theater stage, auditorium part lighting, dressing room lighting, etc.; hospital operating room lighting, etc.

All buildings or facilities that need to use standby lighting, safety lighting and sign lighting after the interruption of normal power supply are regarded as primary loads. In order to ensure that the primary load should be powered by two power sources, there should be no connection between the two power sources, and there should be no simultaneous power outages.

2) It should be a secondary load when one of the following conditions is met.

Shenzhen Totiwo believes that the interruption of power supply will cause greater economic losses, seriously affect the normal work of important units and cause disorder in important public places. For example, the reading room lighting of provincial and municipal libraries; the lighting of senior guest rooms, banquet halls, entertainment halls of three-star hotels and restaurants; the lighting of large and medium-sized railway stations and inland port passenger stations, staircase lighting of high-rise residential buildings, and evacuation sign lighting.

The secondary load should be as good as possible: when common faults such as power transformers or power lines occur (excluding rare natural disasters), the power supply will not be interrupted, or the power supply can be quickly restored after the interruption.

3) Those that do not belong to the first and second loads shall be classified as the third load. The three-stage load can be powered by a single power supply.

Shenzhen Totiwo adheres to the goal of "to help thousands of cities and scenic spots scientifically complete the night tour lighting system, continue to win the night economic development, and quickly realize the people's smart technology, safe and healthy, beautiful and joyful night life"