Digital Lux/Foot Candle Light Meter, AIOMEST Illuminance Lumen Tester 0.01~400,000 Lux, Handheld Luxometro AI-881D for LED Plant Grow Lighting, Luxmeter w/Data Logging & Rotatable Detector

It does everything it says it will! Has a nice little case with it. The spring popped out of the retracting part of the light sensor, but that’s not really a big deal. It’s easier to use this way anyway.

It did just what i needed it to do

It seems to work with LED… I can’t verify it’s accuracy but I added room for error. Giving it +/- 200-400 lux approximation when setting the light. Just observe your plant and adjust light accordingly. If it likes it, then that’s the lux range.

Excellent tool to help manage grow environment

I wanted to measure the output of a bunch of flashlights I’ve picked up over the years to determine how reliable the lumen/brightness claims actually are. While I don’t have a standard against which I can calibrate this instrument, I can use it for comparative measurements in a variety of environments and that is enough to suit my purposes. After some quick poking and testing I figured out how to operate this meter and I’m very pleased with it’s performance. Repeat measurements of the same light sources and comparative measurements between low light and bright lights are both yielding logical results, so I think I can safely say that the meter is operating in the expected manner. All in all, I’m very pleased with it (especially for the selling price) and I expect I’ll find other applications for it in the future.

The ANNMETER AN-881D Digital Illuminance Meter is a very useful tool for insuring that all of your indoor plants are getting equal amounts of light. With so many grow lights on the market, this is also a great way to verify the claims being made by sellers. The display is easy to read even under bright daylight conditions and the measurements appear to be quite reliable.

I appreciate the design most for having enough buttons. Trying to control something like this with 2 buttons would be annoying, so I certainly appreciate having 10 of them.It uses AAA batteries, which is odd, because there's clearly enough room for 2x AA batteries, but they've added a plastic spacer to prevent it from working. There's no good reason for this, if there's room for larger batteries, then they should provide the connections for it.I don't have a way to check for accuracy, but it certainly responds to light and darkness the way I would expect, and has settings for more low-light sensitivity.

I do all kinds of electronic topics on my YouTube channel and cover all kinds of gadgets. So I need to use different type of tools to diagnose a products potential, like decibels, air flow, thermals, and now with this handy gadget, Lux readings. Can't really speak of the accuracy as I need to put it through some more paces .vs other equipment, but the functions are pretty easy to figure out and set and I like that.