Luxi iPhone Light Meter Tested

Author: John Honovich, Published on Oct 04, 2013

Adding a free app to your smartphone to measure light levels sounds great but our recent test showed how poorly they performed. However, a new iPhone accessory, Luxi, claims to deliver far more accurate results at a fraction of the cost (online for $29.95 USD) of professional lux meters ($100+).

Here's what it looks like attached to an iPhone:

In this report, we:

  • Test Luxi's performance at default and calibrated levels against a professional Extech light meter, which acted as our baseline.
  • Compare lux measurements in a variety of scenes.
  • Offer feedback on usability and the importance of calibration.

****** * **** *** ** **** ********** ** ******* ***** levels ****** ***** *** ********* **** ****** *** ********** *********. *******, * *** ****** *********,****, ****** ** ******* *** **** ******** ******* ** * fraction ** *** **** (****** *** $**.** ***) ** ************ *** ****** ($***+).

****'* **** ** ***** **** ******** ** ** ******:

** **** ******, **:

  • **** ****'* *********** ** ******* *** ********** ****** ******* * professional****** ***** *****, ***** ***** ** *** ********.
  • ******* *** ************ ** * ******* ** ******.
  • ***** ******** ** ********* *** *** ********** ** ***********.

[***************]

Key ********

**** *** *** *** ******** **** **** ****:

  • ******* ******** *** ****** **********, *** **** ****** ** ********** with * ************ ***** *****.
  • * ******** *********** ** ********* *** ************ *** ***** ****** (**** than * ***.), *** **** *** ***** ******.
  • **** ******** **********, ****'* ************ *** ***** ** *** ~*-* lux.

***********

***** ** ** ***** ******** **** ****** **** *** *** test. ** ****** ** ***** ****** ******* **** ******* ** a **** ******** ** *** ************. *** ******* ********* ** each ***** ** *** ****** ***** ***** ***********.

***** ** * *********** ********** *** ********. ******* *********** *** highly **********, *** ******** **** **********. ** ****** ****** **** the *********** ******* ** **** ***** **** ** **** *** users. *********** ******* ****** ****:

  • *******: ******** **********: *, *** *********** ********: *.*
  • ******* ***********: ******** **********: -*, *** *********** ********: *.*
  • *** ***** ***********: ******** **********: -*, *** *********** ********: .***

 ***** ** ** ***** ** *** **** ***-** *** *** next ** *** ****** ***** *****.

*********

** *** ****** ********* ************ **** **** ***** ** ******* lux ************ *************. **** **** *** ***** ** "****" ****** to ******* ********* ************, *** ** ** ********* **** *** user **** *** *** ** *** *** ** *** ******. Attaching *** ***-** ** ******, ** ** ****** **** *** top ** *** ***** **** *** ***** ******. **** ** careful, ***** *** ***-** ***** ***** *** ***** ** **** not **** ** ** ****** ** *** *****.

***** ** * **** ******** *****.

 

***************

***** **** ******** *********** ******* * ************ ***** ***** ** be ********, ** ** *** ********* ** ** * **** source ** *** ********. ***** ****** ******** * ************ ***** instead. *******, ****** ************* **** **** ** **** **** ***** ** take ***** ************ ***** **** **** ** ** *********** *** **** compliment ** * ****** ************ *** ***** *** ******* ***.

Comments (3)

This was an interesting little accessory. I'm curious to see if others follow with similar tools for smartphones, or how many light meter apps will add support for them.

You need a long term test to determine if this App will continue to perform well after your pro-calibration. Some poor equipment require monthly calibrations.

Luxi has actually been releasing updates to this app since we did this test claiming to improve accuracy. I've been meaning to see if it got any better. Next time we take lux measurements during testing we'll snap the Luxi on and check it quickly, but we likely won't do anything more than that.

Login to read this IPVM report.
Why do I need to log in?
IPVM conducts unique testing and research funded by member's payments enabling us to offer the most independent, accurate and in-depth information.

Related Reports on Low Light

Axis Launches First Stereographic Panoramic Camera on Apr 05, 2018
Fisheye panoramics have not had much innovation in the past few years, with their multi-imager cousins getting most of the advances, e.g.,...
Dahua 4K Micro 4/3 Camera Tested (IPC-HF8835F) on Apr 03, 2018
Dahua is going big. Their new 4K HF8835F Micro Four Thirds sensor is one of the largest now on the market. Dahua is claming: Starlight...
Axis Z-Wave IP Camera Tested Poorly on Mar 20, 2018
Z-Wave is drawing notable interest for video surveillance use. In IPVM's initial coverage, 84% expressed interest in it, with nearly half being...
May 2018 Camera Course on Mar 16, 2018
Our next course starts on May 8th. Register now for the Spring 2018 Camera Course This is the only independent surveillance camera course, based...
Camera Form Factor Guide on Mar 16, 2018
When selecting surveillance cameras, users may choose from a number of different form factors, each with its own unique strengths and weaknesses,...
Next Gen 5MP / 6MP Camera Shootout (Axis vs Dahua vs Hanwha vs Hikvision) on Feb 28, 2018
Many manufacturers have released new generation 5MP / 6MP cameras that tout super low light, WDR and other features historically typical in 1080p...
Hikvision 6MP Camera Tested (DS-2CD4565-IZH) on Feb 27, 2018
In the next installment of our ongoing testing of 5MP/6MP cameras, we test the Hikvision DS-2CD4565F-IZH, a 'Smart Series' vandal dome combining...
Hanwha Wisenet X 5MP Camera Tested (XNV-8080R) on Feb 13, 2018
Wisenet X is Hanwha's high-end camera line. We tested their Wisenet X 1080p camera last year. Now Hanwha is offering 5MP cameras listing super low...
Axis 'Best' Q3517-LVE 5MP Camera Tested on Feb 05, 2018
Axis boasts of its Q3517-LVE: Simply put, AXIS Q3517-LVE delivers the best video quality possible. But is it really the 'best'? We bought...
Dahua 5MP Starlight Camera Tested (N52BM3Z) on Jan 30, 2018
Is 5MP the new 1080p? According to our recent statistics, average resolution continues to trend upwards. And now, manufacturers releasing new...

Most Recent Industry Reports

Global Real-Time Video Surveillance - EarthNow on Apr 20, 2018
A new company, EarthNow, with backing from Bill Gates, Airbus and more, is claiming that: Users will be able to see places on Earth with a delay...
Dedicated Vs Converged Access Control Networks (Statistics) on Apr 20, 2018
Running one's access control system on a converged network, with one's computers and phones, can save money. On the other hand, hand, doing so can...
April 2018 IP Networking Course on Apr 19, 2018
This is the last chance to register for our IP Networking course. Register now. NEW - 2 sessions per class, 'day' and 'night' to give you double...
Rare Video Surveillance Fundraising - Verkada $15 Million on Apr 19, 2018
Fundraising in video surveillance (and the broader physical security market) has been poor recently. Highlights are few and far in between...
'Best In Show' Fails on Apr 19, 2018
ISC West's "Best In Show" has failed. For more than a decade, it has become increasingly irrelevant as the selections exhibit a cartoon level...
Security Camera Cleaning Frequency Statistics on Apr 18, 2018
150+ integrators told IPVM how often they clean cameras on customer's sites and why.  Inside we examine their answers and break down feedback...
Worst Access Control 2018 on Apr 18, 2018
Three access control providers stood out as providing the most problems for integrators. In this report, we analyze the answers to: "In the...
Axis VMD4 Analytics Tested on Apr 17, 2018
Axis is now on its 4th generation of video motion detection (VMD), which Axis calls "a free video analytics application." In this generation, Axis...
Arecont CEO And President Resign on Apr 17, 2018
This is good news for Arecont. Arecont's problems have been well known for years (e.g., most recently Worst Camera Manufacturers 2018 and starting...
Strong ISC West 2018, Says Manufacturers, GSX / ASIS Expected Weaker on Apr 17, 2018
Manufacturers say ISC West 2018 was strong, continuing the trend we have seen in 2017 results and 2016 results. However, those same 100...

The world's leading video surveillance information source, IPVM provides the best reporting, testing and training for 10,000+ members globally. Dedicated to independent and objective information, we uniquely refuse any and all advertisements, sponsorship and consulting from manufacturers.

About | FAQ | Contact