🌅 Twilight Switch

A twilight switch(photoelectric switch) is an automatic controller that turns lighting ON at dusk and OFF at dawn based on ambient light level, not time.
It ensures lighting operates only when natural light is insufficient.

🟦 What a Twilight Switch Does

• Detects ambient light using a built‑in or external sensor
• Switches loads automatically at dusk/dawn
• Compensates for seasonal changes — no reprogramming needed
• Improves energy efficiency by avoiding unnecessary lighting

🟧 Key Characteristics

• Light‑level threshold adjustable (lux‑based switching)
• Sensor‑based control — no clock or schedule required
• DIN‑rail or external sensor versions
• Ideal for outdoor use — weather‑resistant designs

🟨 Typical Applications

• Street and pathway lighting
• Building façade lighting
• Signage and advertising boards
• Garden and landscape lighting

⭐ One‑line summary

A twilight switch automatically controls lighting based on ambient light levels, turning lights ON at dusk and OFF at dawn for reliable, energy‑efficient outdoor illumination.