Accurate light measurement is critical in agriculture, horticulture, and turf management, but not all sensors measure light the same way.
SpotOn® Sensor Technology was engineered to solve a common industry problem: inconsistent and distorted PAR readings caused by uneven sensor response across the light spectrum. By combining a proprietary filter stack with a precision integrating light sensor, SpotOn® delivers a true flat PAR response from 400 to 700 nanometers, exactly where Photosynthetically Active Radiation (PAR) lives.
Why a Flat PAR Response Matters
PAR represents the portion of the light spectrum plants use for photosynthesis. In real-world conditions, light comes from many sources, sunlight, LEDs, high-pressure sodium, metal halide, and more. If a sensor over- or under-responds to certain wavelengths, readings can be misleading.
A flat response ensures that:
- Blue, green, and red wavelengths are measured accurately
- Readings remain consistent under both natural and artificial light sources
- Data reflects actual plant-usable light, not sensor bias
This is especially important in controlled environments such as greenhouses, indoor grow operations, research facilities, and turfgrass management.
How SpotOn® Sensor Technology Works
SpotOn® Sensor Technology integrates two key elements:
Proprietary optical filter stack
Carefully engineered to shape incoming light so the sensor responds evenly across the PAR range.
Integrating light sensor design
Captures and averages light from multiple angles, reducing directional error and improving repeatability.
Together, these components produce a response curve that closely matches the ideal PAR response—as shown in the comparison chart—while minimizing the spectral distortion commonly seen in competitive sensors.
Consistent Performance Across Light Sources
Many sensors perform well under sunlight but struggle under artificial lighting, especially LED systems with narrow spectral peaks. SpotOn® Sensor Technology maintains accuracy across:
- Full-spectrum sunlight
- LED grow lights
- HPS and metal halide lamps
- Mixed-light environments
This consistency allows users to confidently compare readings across locations, seasons, and lighting systems.
Designed for Real-World Decision Making
Whether used for crop production, turf management, or research, SpotOn® Sensor Technology provides dependable data that supports better decisions, without the need for complex corrections or assumptions.
By delivering a flat, standards-aligned PAR response, SpotOn® tools help users focus on what matters most: optimizing growth conditions, improving efficiency, and protecting long-term plant health.