Light Sensor Manufacturers
- Panasonic Electric Works - Subsidiary of Panasonic. Used to be Aromat. Some interesting motion sensors.
- Vegetronix - Vegetronix specializes in low cost soil moisture sensor probes, grow lights, data logers, and SDI-12 protocol translators, and irrigation systems and solutions. Their moisture sensor probes are sensitive and accurate enough to be used in research grade instrumentation, but because of their extreme low cost they can be deployed on a massive scale in irrigation systems.