Apogee InstrumentsMQ-500 Full-Spectrum Quantum PAR Meter & Telescopic Wand Bundle - Digital PPFD Meter for LED Greenhouse Grow Lights, Sunlight, & Plant Monitoring

Good product and quality!

Under pure 660nm LED grow light, MQ-500(569USD), VBR-100 PAR Meter(57USD), and Everfine(1200USD) are almost the same, but DANOPLUS DP-355 are 10% higher. I wonder why DANOPLUS DP-355 has 300+ sales monthly?

Too difficult to use from inadequate directions

I finally upgraded and got a couple apogee par meters and they're living up to the hype so far. I bought an mq-500 and mq-610 Epar cause I'm running spyder and iluminar "beyond-par" fixtures for my grow. First impressions are the sensors are built like a tank and I'm getting super tight readings to my spectroradiometer. My old par meter was way off. I knocked a star off just because the epar one picks up the far red in my Iluminar, while this one is only par. I might post again later but so far I'm happy with the investment.

I have a lot of rare tropical plants indoors that I'm constantly fussing with, so getting lighting right is extremely important. Measuring light shouldn't be that complicated or expensive but it is. I was happy to get this as a promotional item, I have no idea if it measures accuratly or not, but how to work this doesn't exist really in the box. I mean, you put the sensor at the plant and push a button and it gives a reading, but a millimeter tilt one way or another and your reading goes dramatically up or down. I don't see much direction one way or another on how to use other features, if they exist, besides point and push a button.But it does give a reading and I am trusting it to be accurate, I just wish this had an actual proper manual in the box and that it wasn't so much money to get.