Light Meter LM-3000

Light Meter LM-3000

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Logo of Light Meter LM-3000

Light Meter LM-3000: Professional-Grade Precision in Your Pocket

The most accurate, ad-free tool to measure lux, foot-candles, and color temperature. Calibrated by optics scientists for photographers, plant parents, and professionals who demand scientific accuracy.

Download on App Store

Publisher

Lightray Innovation GmbH

Category

Utilities

Downloads

490K+

User Rating

4.6/5

Total Ratings

7K+

Locales

7

Precision in Every Pixel

Discover the interface used by 490K+ users.

iPhone showing Light Meter LM-3000 app interface with a 25700 Lux measurement

iPhone showing Light Meter LM-3000 app interface with a 25700 Lux measurement

A screenshot of the Light Meter LM-3000 app manual explaining how to use the front camera to measure light without an external sensor.

A screenshot of the Light Meter LM-3000 app manual explaining how to use the front camera to measure light without an external sensor.

Light Meter LM-3000 app interface on iPhone showing lux and foot candle measurements

Light Meter LM-3000 app interface on iPhone showing lux and foot candle measurements

Light Meter LM-3000 app displaying a precise lux reading in a low light environment

Light Meter LM-3000 app displaying a precise lux reading in a low light environment

Professional Precision for Every Project

The tools that make this app stand out, trusted by 490K+ users.

🎯

Scientific-Grade Accuracy

Developed by optics engineers and calibrated against professional Class A equipment to provide measurements you can truly trust.

📸

Photography & Color Mastery

Instantly measure Kelvin (CCT) and Lux to set perfect white balance and exposure, eliminating guesswork in your creative workflow.

🌱

Optimized Plant Growth

Track precise Foot-candle and Lux levels across your home to ensure your indoor garden receives the ideal light for healthy growth.

Loved by users worldwide

Trusted by 490K+ people who love this app.

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"I replaced my expensive handheld light meter with the LM-3000 for my studio shoots. The color temperature readings are incredibly consistent and the interface is so clean. It is rare to find an app this precise that does not clutter the screen with ads."

Marcus Thorne
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"This app is a game-changer for my indoor jungle. I finally know exactly where to place my monsteras for the perfect lux levels. It is professional, easy to use, and I love that my purchase supports environmental nonprofits!"

Elena Rodriguez

About the app

Everything you need to know about Light Meter LM-3000.

Description

Measure illuminance in lux, foot-candle, or color temperature (CCT) in Kelvin — all in one, with the most accurate light meter app out there. Why waste money on a hardware meter when you’re already carrying one in your pocket? The LM-3000 offers the same quality and usability as a handheld or pocket light meter. You won't need any additional light sensor — the camera already got you covered. The LM-3000 comes with a clean and simple user interface and most importantly: No Ads! See it in action here: https://youtu.be/EJW7NfE2qCk The LM-3000 is even more accurate than almost any cheap light meter available. Besides that, its measurement algorithm delivers unrivaled sensitivity to capture the faintest lighting changes, empowering new possibilities in light pollution and health research. Developed and tested by optics scientists and engineers, calibrated using professional grade Class A equipment for all iPhones and iPads, the LM-3000 is truly a light meter you can trust! Download the app for free and use it for some time! If you like it, you may buy the unlimited battery pack to use the LM-3000 for as long as you want, even when switching to a new device. Your purchase allows us to provide an Ad-free experience and helps our small team to keep on building great apps to measure light accurately and easily. To allow the app to accurately measure light intensity (lux or foot-candle) you must use a diffuser. You can either easily build one yourself for free or get the easy-to-use Diffuser & Cosine Corrector accessory from our website (-> lightray.io/diffuser). If you encounter any problems or have feedback, don't hesitate to reach out: https://lightray.io/lightmeter#contact As a proud member of 1% for the Planet we are donating at least one percent of all our revenue to environmental nonprofit organizations. With everything that you purchase from us, YOU will be giving back!

Latest Version

4.4.0

Size

21.5 MB

First Released

Mar 9, 2021

Ready for Scientific Precision?

Join over 490,000 photographers, growers, and professionals who trust LM-3000. Download the ad-free, scientist-calibrated light meter today and start measuring with confidence.

Download on App Store
FAQ

Frequently Asked Questions

Everything you need to know about Light Meter LM-3000

What measurements does the Light Meter LM-3000 app provide?

The Light Meter LM-3000 app measures illuminance in lux or foot-candles and correlated color temperature (CCT) in Kelvin. It delivers professional-grade precision.

How does Light Meter LM-3000 achieve its accuracy?

The LM-3000 achieves professional-grade accuracy by leveraging the iPhone's front-facing camera sensor with advanced RAW image processing. It adheres to the ISO/CIE 19476 standard and is pre-calibrated.

Does Light Meter LM-3000 require an external sensor for measurements?

No, Light Meter LM-3000 does not require an external sensor. It utilizes your iPhone's integrated front-facing camera sensor to capture incident light for all measurements.

Is a diffuser required to use the Light Meter LM-3000 app accurately?

Yes, the Light Meter LM-3000 app requires a diffuser for accurate measurements. Users can build one with printer paper or purchase a dedicated Diffuser Accessory for best results.

Does Light Meter LM-3000 offer a free trial period?

Yes, Light Meter LM-3000 offers a free trial period. It lasts for two non-consecutive days, allowing users to thoroughly evaluate the app's features and functionality.

What are the purchase options for Light Meter LM-3000 after the free trial?

After the trial, Light Meter LM-3000 offers three options: a single charge for 48 hours, a monthly subscription for continuous use, or a one-time purchase for unlimited lifetime access.

Can the Light Meter LM-3000 app perform well in low light conditions?

Yes, Light Meter LM-3000 features excellent low light sensitivity. It detects even the tiniest changes in low light environments, making it suitable for various scenarios.