Royce Thompson Electric MICROSTAR 2000 < 0.25W Lighting Controller Switch, Filtered Silicon Photodiode, 220 to 270 V

Illuminate public areas such as car parks with this electrical lighting controller from Royce Thompson Electric. It switches on and off in response to changes in ambient light levels to automatically provide illumination when it gets dark. A miniature size of 57 (length) x 21 (width) x 25mm (depth) makes it easy to fit the unit in lamps where space is limited. Low power consumption of less than 0.25W makes this an energy-efficient option. With an accurate switching ability, you can rest assured that this unit will provide light when it's needed.

• Wide operating temperature range of -20°C to +60°C for use in demanding environments
• Pre-programmable switching levels to meet individual requirements
• Robust polycarbonate casing that resists the ageing affects of heat and UV light for an extended service life
• Miniature size allows it to be hidden from sight to reduce the risk of unauthorised tampering

• Street and floodlighting
• Arterial roadways
• Tunnels and underpasses

You can use this versatile controller switch with LED, halogen or discharge lighting.

Daylight Lighting Controllers

These controllers automatically turn lights 'ON' and 'OFF' in response to changes in ambient light levels, primarily the transition from day to night and vice-versa. The more advanced types (see note below) have inbuilt logic to minimise false triggering, whereas the remainder have inbuilt time delays or higher 'OFF' thresholds, to prevent on/off cycling. As a general rule, these controllers should be sited such that they are not illuminated, by the light they are controlling. Nominal supply voltage is 230Vac.,Note regarding energy-saving negative-hysteresis controllers,Where figures for the 'OFF' threshold are lower than for the 'ON' threshold, the sensor is designed such that four thresholds are actually monitored. These are: dusk, the middle of the night, dawn and the middle of the day. Monitoring at times other than dusk and dawn enables the sensor to determine what it should be looking for next, minimising false triggering and improving overall controller operation.