The right meter depends on the decision you need to make. Start with the measurement question — not the model number.
Each card below starts with the real-world question and then points to the AquaHorti tool designed for that measurement job.
Use a handheld spot-check workflow when you want to compare positions, fixture height or grow-light settings.
Choose a logger when one spot reading is not enough and you need to understand changing light across the photoperiod.
Use a multi-parameter workflow when crop performance depends on both light and the surrounding growing environment.
Measure at the real working surface and compare multiple points instead of relying on one center reading.
Measure where the coral sits, not only at the water surface. Compare depth, placement, shadows and fixture settings.
Choose a controllable fixture when the goal is to build and automate the light schedule itself.
Use a sunlight-specific UVI workflow when you want a local outdoor reading plus accumulated UV-dose awareness.
Use a wavelength-specific irradiance meter when visible brightness does not answer the question.
Use a targeted red / NIR meter when a broad visible-light reading would be irrelevant.
Use a purpose-specific optical workflow for curing-light output rather than a generic lux meter.
Use a solar irradiance meter when you need incident solar power in W/m², not electrical panel output.
Use an environmental control product when your goal is automation rather than measurement alone.
Use the Wi-Fi LightFan Controller when you need connected automation for a compatible setup.
Use this table after you have narrowed the measurement question.
| Product | Main question | Core measurement / function | Best starting point |
|---|---|---|---|
| AH-Quantuv | How much PAR reaches my plants? | PAR / PPFD, UVA, Blue/Green/Red PAR | Open product → |
| AH-PARDLI | How much light accumulated across the day? | PAR logging, DLI, history, CSV | Open product → |
| AH-200 | How do light and crop environment look together? | PAR, DLI, CO₂, temperature, humidity, VPD | Open product → |
| AH-300 | Is indoor lighting bright and evenly distributed? | LUX / FC, CCT, blue-light data, mapping | Open product → |
| AH-Reef | What light reaches my corals underwater? | Underwater PAR, UVA, R/G/B, mapping | Open product → |
| MegaReef 100 | Do I need to control a reef LED system? | Seven-channel Bluetooth-controlled reef LED light | Open product → |
| AH-Sunuvi | What is the current sunlight UV Index? | UVI + accumulated UV dose reminder | Open product → |
| AH-NUV | How strong is a 385 / 405 nm UV source? | 385 / 405 nm UV irradiance | Open product → |
| AH-RDNIR | How much 660 / 850 nm irradiance is present? | 660 nm red + 850 nm near-infrared irradiance | Open product → |
| AH-DCLM | Do I need to check a dental curing light? | Blue + UVA measurement | Open product → |
| AH-SOL | How much solar irradiance reaches this location? | Solar irradiance in W/m², Hold, 99 readings | Open product → |
| AH-LightFan | Do I need grow-light + fan automation? | Wi-Fi grow-light and fan control | Open product → |
| Wi-Fi LightFan Controller | Do I need connected inline fan + light automation? | Inline duct fan + grow-light automation | Open on Amazon → |
The product selector gets you to the right family. The Topic Hubs explain the measurement workflow in more detail.
Plant-light and crop-environment measurement workflows.
Indoor lightingBrightness, distribution and supported white-light evaluation.
Reef lightingMeasure at coral level, map the tank and verify adjustments.
UV / optical / solarSunlight UVI, 385/405 nm UV, 660/850 nm red/NIR and solar irradiance.
Choose AH-Quantuv for handheld PAR / PPFD measurement with UVA and RGB PAR comparison.
Choose AH-PARDLI when you need PAR logging across the day, DLI and long-term light history.
Choose AH-200 for PAR, DLI, CO₂, temperature, humidity and VPD.
Choose AH-300 for LUX / foot-candle, CCT, supported blue-light parameters, multi-point LUX mapping and Spectrum Preview.
Choose AH-Reef to measure underwater PAR and UVA. Choose MegaReef 100 when you need a controllable multi-channel reef LED light.
Open the AquaHorti Measurement Glossary first, then return here or follow the linked Topic Hub for the relevant measurement workflow.
AquaHorti tools are specialized for different measurement jobs. Start with the decision you need to make, confirm the measurement type, then open the matching product page for specifications and limitations.