Lux Light Meter Photometer PRO

In-app purchases
2.58K reviews
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About this app

We all want more light in our lives. But how much is too much? And how much is not enough? That's where Photometer PRO comes in.

Our lux light measure app - Photometer PRO - helps you measure the brightness of your environment so that you can get the right amount of light for every situation.

👉 WHO CAN BENEFIT from our lux light measure app?

Whether you're a construction worker trying to compare different light levels after switching out your Halogen bulbs for LEDs, or just a flower hobbyist who wants to make sure each of your plants gets exactly the right amount of light, our lux light measure app - Photometer PRO - has got you covered. It even helps biology teachers practice photosynthesis!

✅INCREASE YOUR PRODUCTIVITY: whether you are a lighting designer, architect, electrician or just working from your home office - you can use the app to measure light levels and optimize lighting conditions, increasing productivity and enhancing the visual appeal of your projects

✅IMPROVE YOUR PLANT'S GROWTH: whether you are a horticulturist, greenhouse owner, or just a millennial (as we are!) who loves a little jungle in your home - you can use the app's PPFD calculator to determine the optimal light levels for plant growth, helping them create ideal growing conditions

✅SAVE THE ENERGY: our lux light measure app - Photometer PRO - helps homeowners, business owners, and lighting professionals select the right light bulbs and lighting fixtures, reducing energy consumption and promoting sustainable living

✅IMPROVE YOUR HEALTH: proper exposure to bright light, cool light, or a specific lighting schedule can significantly reduce the perception of stress and burnout. Light also plays a key role in setting and regulating the body’s biological clock (hormone function, like melatonin)


With high-accuracy light measurement, you can be sure that your readings are as precise as possible. You can even export all your measurements to a CSV file and work with the data like a professional. Plus, the app offers many functionalities, including Lux and Foot-candle units, Full light sensor information & calibration, PPFD Calculator, a Greenhouse module, a Photovoltaics module, and more.

✅ High-accuracy light measurement
✅ Export all measurements (lx, fx, W/m2) to a CSV
✅ Lux and Foot-candle units
✅ Measures & record minimum, average and maximum brightness possible
✅ Full light sensor information & calibration
✅ Measure indoors & outdoors
✅ Compare the room’s brightness level
✅ Light meter to do experiments
✅ Test flashlights and other light equipment
✅ Setup projector screen


🔸LIGHT MAP - make a light map of your interior and check if your home is adequately lit

🔸PHOTOVOLTAICS - measure light volume, record and create a real-time light volume graph to improve your electricity production

🔸PHOTOGRAPHY - measure exposure, lux/foot-candle, f-number, and shutter speed as well as ISO sensitivity

🔸GREENHOUSE - measure and calculate supplemental light in your greenhouse or indoors with many light sources option

🔸AQUARIUM - measure the adequate amount of light needed in your aquarium for plants, based on their type and size

🔸RGB - measure color temperature (R, G, B) and the amount of lux using a camera in your smartphone

✨CALCULATORS✨ you can find in our lux light measure app - Photometer PRO

✅ Greenhouse module with PPFD calculations
✅ PPFD Calculator
✅ Lux to Lumen Calculator
✅ Lumen to Lux Calculator
✅ Lux to Candela Calculator
✅ Candela to Lux Calculator

✨Other benefits✨

✅ Support many languages
✅ Smart, minimalistic, simple, and intuitive user interface
✅ Dark Mode
✅ Instant start & excellent performance
✅ Insights & Knowledge base
✅ Ready for professional & productive usage
✅ A closed beta group for PRO users

💡 Photometer PRO is a project with a bold vision: Provide free and open access to light measurements and knowledge to everyone worldwide.

Updated on
Apr 10, 2023

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
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No data collected
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Ratings and reviews

2.55K reviews
A Google user
June 12, 2019
thank you for including charts for various average lighting condition. It beats having to pull out a separate chart. Maybe you could add Kelvin equivalents. Cheers. I run this on a Moto E4 and it doesn't quite fit entirely on my screen. The calibrated texts top half is barely visible. If there is some kind of settings for this, I am unaware of it.
69 people found this review helpful
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Przemek Pardel
June 20, 2019
Hi, thanks a lot for this opinion. This is really valuable. I will try change all those parts ASAP. Cheers PP
Scott Livingston
October 28, 2022
Cool app. I use it for general light level comparison, not photography. Mostly to match various cheap "smart" bulb outputs around the house. It would be very nice to see Lumen added to the meter options rather than using the Calculator in the Pro version. As I move from a Pixel 4XL to a 7 Pro I noticed the readings are quite different. I need to look to see if there's some sort of calibration I need to do.
90 people found this review helpful
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Mark Ramey
May 11, 2020
I don't know much about photovoltaics but, I wish I could have a logger that samples all day (maybe 10-12 hours). I would like to plot the result. I would also like to know the angle, time/date and location all for serveying my property for best location for cells. Location for me is optional but others would like it. Thanks! I forgot that it could be improved by add the ability to export samples to *. CVS files so people can integrate data into custom/or other types of applications. Sounds fun
50 people found this review helpful
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Przemek Pardel
October 1, 2020
Hi Mark, thanks a lot for your feedback. This is really great idea. I will consider add those features to the app! I'm one man show 😃 so please expect long delivery time. Have a great week. Cheers PP. Update: Thanks a lot Mark! Amazing idea! I'm huge fan of data analysis and open data.I will definitely add this to the app.Cheers PP [Update] Done ❤

What's new

Application optimization + bug fixes