VBR-100 Quantum PAR Meter 6000umol/(㎡s), RGB PAR Breakdown, PPFD Distribution Mapping, Bluetooth Free App, Sensor Name(VBR-100 Plus), No Spectrum Selection

Quite easy to use, settles on a reading quickly, and gives consistent readings with little noise. For the price, this is great. I don't have another PAR meter to compare it to, but based on readings I've taken from other lights that I have quantified, this seems to be pretty close to the $500 meter I rented a while back. One feature that I wish that they'd incorporated would be the ability to use it as a true daylight exposure meter, where you leave it in one place throughout the light cycle and it provides the DLI for that exposure time. Right now the app does have a DLI calculator, which certainly is nice for situations where light is constant, but that is based on the instantaneous reading and the number of hours you enter into the calculator. If this functionality was added to the app, this would be a really exceptional piece of kit.

Should have gotten this years ago. Really works very well on LED grow lights. Sound investment. Stop burning your plants and know exactly how much par and ppfd and DLI. If you know you know .

Here's the deal - I found this very useful both indoors and out. It helped me map my greenhouse lighting and the yard for intensity, and was superior to 'phone apps' in this regard. There is a caveat - sunlight intensity is bang-on, within 5% vs weather station predictions. However, indoors under full spectrum grow lights with deep red, or UV, or higher frequency blue tones - this would UNDER estimate PAR by 20-40%. I believe this is due to several factors: even high quality LED light is less even spectrum than sunlight, and whatever equation is used by the sensor doesn't account for uneven sensitivity to spikey spectrums; I don't believe this meter accurately measures above 650nm or below 450nm - no ePAR here; the geometry of the lights, while apparently cosine corrected under some fixed function by the meter, the diffusion panel is not perfect, and can over or under estimate when point sources are used, even if they are distant. This reduces linearity. If you really want accurate measurements under LED, I recommend taking several heights as well, and generating your own inverse square function to characterize your light cone. The cost is hard to beat, and the results are highly reproducible (precise) even if some adjustment is required for accuracy per situation. I would take several close readings in a small area (10" circle) and average them for a truer report. The property angle for best accuracy is directly vertical. If the lights are LED, especially broad spectrum, watch your plants for signals that PAR is higher than estimated - depending on your spectrum, they may be getting half again the photons this suggests. Still, I found this a useful tool, and will continue to use. Phone connection is dead simple and stable. Mapping feature is useful. Outdoors it is directly reliable. I would recommend to the vendor that they include selection of light source modes and provide more accurate models based on the type of lighting being measured, rather than calibrate to solar spectrum only, as this appears to do.

Works great very simple to use. As far as I know, it’s reading what it’s supposed to. I have nothing to double check it with, but I know where it’s at so when I change the light setting, I know exactly how much I’m going up or down on intensity. easy to hook up to your cell phone very convenient I would recommend

This seems to work well! I compared this with the readings from an apogee par meter and it was pretty spot on.

Really handy tool. Price is OK for what you get but it is definitely a handy tool if you are a serious gardener

I am new to using a meter but not to how to use and read the numbers. This thing is fast and a great addition. I appreciate that I got it so fast as well. Thank you.

So far I really like the VBR-100 Plus. When I bought my lights I knew they were overkill but without a light meter I was in the dark knowing what my actual ppfd readings were. The only PAR maps for the spider farmer G1000 were at 12” in a 4x4 grow tent. This tool allowed me to map my room and better understand my grow area. I immediately went for max ppfd near light center and found that at 24” light hight I was seeing 1550ppfd. A friend with an Apogee PAR meter offered to buy a VBR-100 and check its accuracy. My only complaint so far is the location of the power button. It is far too easy to accidentally turn the unit off when picking it up to move to the next location while recording data for the grid. Currently the app grid function is limited to 6 rows x 6 columns max. It would be nice to have a larger grid capability. If the accuracy is reasonable this is a great tool to have!

Helps alot.

Entrega muy rápida. Cumple su función perfectamente igual que otro mucho más caro. Medición muy fiable. Muy contento

Es muy buen aparato, práctico y útil para medir la cantidad de luz que llega a las plantas.

seems to work great, the DLI calc is very helpful and the reason i bought this. the grid feature is great also, you can get readings for each plant/part of the grid and then gives you an average. if trying to maximise your grow this is a very useful bit of kit

Dobry produkt. Odczyty są bardzo zbliżone do odczytów innych budżetowych mierników i wydają się realistyczne. Wystarczy zdać sobie sprawę, że to nie sprzęt laboratoryjny i cieszyć się możliwością pomiaru PAR w trzech podzakresach (R G B). Pomiary te są prawdziwe a nie symulowane (testowane z lampami R+B i latarką). Polecam.