The total number of hours that a PECU operates the light each year is called the annual burning hours. Table 1 below shows a TYPICAL example of the burning hours for PECUs (Photocells) with various switching ratios and switching levels. The actual number of hours will vary according to the weather profile of the year and the exact location of the installation.

Table 1: Comparison of typical burning hours

Also see

• What are PECUs (Photo Electric Control Units)? - Including part night PECUs (Photocells) and part night dimming PECU
• Energy consumption for photocells
• Daylight and photocells- what you need to know
• Sensors used in PECUs (Photocells)
• Load switches used in PECUs
• Characteristics of a street lighting load
• Formats for photocells

To find out more about the Zodion Lighting Controls range of Photo Electric Control Units, please browse our catalogue pages.

Our PECUs range includes:

• Miniature Photocells
• One-Part Photocells
• Two-Part Photocells
• Sockets and Accessories for PECUs

If you have any questions, please contact us on 01422 317 317 or fill in our contact form we will be delighted to answer any questions you might have on PECUs.