What does the HORTIVISION PRO SERIES 2.0 Quantum PAR Meter actually measure?
It measures true PAR light (400–700nm) that plants use for photosynthesis. It displays both PPFD (µmol/m²/s) and DLI (mol/m²/day) to help dial in lighting over time. It does not measure UV or far-red light.
Is the HORTIVISION Quantum PAR Meter accurate for LED and other grow lights?
Yes—it works accurately with LEDs, HID, CMH, and natural sunlight. Unlike lux meters, it measures usable plant light, making it a reliable tool across different grow setups.
What accessories are included with the HORTIVISION Quantum PAR Meter?
It comes with a detachable sensor, coiled and straight cables (1.5m and 3.65m), and an extendable stick (20–95cm). It can also be tripod-mounted using a standard 1/4” thread for stable, repeatable measurements.
Is the HORTIVISION PAR Meter easy to use in grow tents?
Yes—it’s built for grow environments with a backlit display, simple controls, and one-handed operation. It runs on 2× AAA batteries (included) and fits well in tight spaces with its extendable reach.
How do I take a proper PPFD reading with the Quantum PAR Meter?
Hold the sensor flat at canopy height, avoid shading it, and let the reading stabilize. For accurate comparisons, keep sensor height and angle consistent across measurements.
How do I map my grow space using the HORTIVISION PAR Meter?
Take readings in a grid (e.g., center, corners, and midpoints) at the same height. Averaging those gives you a clear picture of light distribution, hotspots, or underlit zones.
What PPFD should I aim for at different plant stages?
Seedlings prefer lower PPFD, veg needs moderate levels, and flowering benefits from higher values. Use the meter to find a balance—too much light can cause stress if the environment isn’t dialed in.
Can the PAR Meter help prevent light stress and stretching?
Yes—it reveals when intensity is too high or too low. Signs like bleaching or stretching can often be traced to incorrect PPFD. Use the meter to adjust light height and dimming accordingly.
How does the meter help with DLI and photoperiods?
It calculates DLI automatically based on PPFD and light hours. Changing your photoperiod or dimming will change DLI, so you can fine-tune daily light intake by adjusting one or the other.
Can the PAR Meter help reduce wasted electricity?
Yes—by showing where you're over-lighting or under-lighting, you can optimize fixture placement, dimming, and schedules to improve plant health without wasting power.
Can I use the PAR Meter to compare different grow lights?
Absolutely. Place both lights at the same height, use the same measurement grid, and compare average PPFD and uniformity. This gives a real-world comparison beyond spec sheets.
Does the meter need calibration or maintenance?
It’s factory-calibrated and rarely needs recalibration. Keep the sensor clean with a soft cloth and avoid harsh cleaners. If readings seem off, check cables, batteries, and positioning first.
Is the Quantum PAR Meter suitable for hobby growers?
Yes—it’s user-friendly for beginners while offering detailed insights for advanced growers. It saves time, avoids guesswork, and helps hobbyists and pros alike grow better plants with fewer problems.
How often should I check PPFD and DLI with the meter?
You don’t need to measure daily. Re-check after adjusting light height, dimming, training, or moving plants. Regular checks help maintain optimal lighting as your canopy develops.
Can I use the Quantum PAR Meter across multiple zones or racks?
Yes—it’s great for balancing light across propagation shelves, rotating plants in uneven canopies, or managing multiple strains. Use it to ensure consistent intensity in all areas of your setup.
