HeatingSave, the microprocessor powered boiler control system which saves up to one-third off bills compared to your existing heating system, better manages any type of heating, lighting, electricity and water usage. For lighting, HeatingSave allows you to install our light level sensors and connect these into spare temperature sensor sockets on the existing HeatingSave system. Two types of light sensor are available: outside light level sensors and inside light sensors. The latter sensor measures internal luminescence. There are four trigger points for detecting thresholds typically for minimum lighting levels in offices, factories and workshops.