Want to turn lighting systems on and off without lifting a finger? Put your trust in this lighting controller from Royce Thompson Electric. Its high-speed silicon photodiode sensor triggers switching in a jiffy to save energy. The component monitors four daily thresholds to clamp down on false triggering and boost performance. Thanks to its rugged IP65-rated casing, it's dust-proof and withstands water splashes to prevent damage and downtime. This weather-resistant device works like a charm in temperatures between -20°C and +60°C.

• UV-resistant housing for use in outdoor equipment
• Diameter of 81mm fits easily in confined setups
• Wide operating voltage range between 220 and 270V AC makes it compatible with the standard UK supply

• Street lights
• Car parks
• Retail centres
• Healthcare facilities
• Security systems

Installing this unit is a cakewalk – simply insert the pre-terminated base into a compatible fitting to hook it up to your lights.

You can trust this energy saver to consume less than 0.25W.

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.