![](https://kayec.org/wp-content/uploads/2019/02/DSC_02291-1024x683.jpg)
Street lights in training known as HPS, which is automatically controlled by a component named photo-electric cell (day-light switch) is one of the essential panels for a level one trainee.Next to it is a 3 heat stove switch.
Street lights in training known as HPS, which is automatically controlled by a component named photo-electric cell (day-light switch) is one of the essential panels for a level one trainee.Next to it is a 3 heat stove switch.