The AH-Reef PAR Meter is a professional-grade instrument designed for serious reef tank hobbyists who demand precise control over their aquarium lighting. Light is the driving force behind coral health and color – this meter lets you manage it scientifically. By measuring the full photosynthetic spectrum (PAR) plus UVA and separate RGB channels, you gain a complete understanding of how your lighting setup affects your corals. Every reef coral species thrives at different light intensities and spectra; the AH-Reef meter helps you dial in just the right balance. Operating the AH-Reef meter is straightforward yet powerful. Simply place the waterproof sensor at any point in your aquarium. The backlit LCD will instantly display PAR and UVA readings with high precision. If you want to record a value, press the HOLD button to freeze it on-screen. To compare lighting in different areas, use the RECORD function to log multiple points – up to 99 readings can be saved. This lets you create a detailed light map of your tank, identifying bright spots and shadows so you can rearrange corals for optimal growth (placing light-loving corals in the brightest areas and shade-preferring species where the light is dimmer). Accuracy is at the core of the AH-Reef meter's design. Its precision sensor is manufactured by a renowned company and calibrated to exacting standards. This scientific calibration means each measurement you take is reliable enough for professional applications. With the AH-Reef PAR Meter, you get a lab-accurate light measurement tool in a user-friendly package. It's the ultimate accessory for reef aquarium enthusiasts who want to ensure their corals receive exactly the right light for vigorous, healthy growth. Elevate your reef-keeping to a scientific level by monitoring and fine-tuning your lighting with this advanced PAR meter.