Recommendations for a light meter?

mgookin

Senior Member
Location
Fort Myers, FL
Depends what you're doing with it.

If you're looking to do forensic analysis involved with litigation, there are calibrated meters available.

If you just want to make sure something exceeds the minimum light levels required around ATM's or at various different locations in or around a building, and you're not cutting things real close, any $20 off the shelf meter should do.

We own around 15 light meters. Some are data loggers and some are handheld. As far as longevity and accuracy, we've only had one go out of whack in about 5 years and it just went 10% out of calibration. To verify calibration we set all of our meters on the same "x" on a table inside and look for the same reading on each one. If one is out of calibration and we just throw it away.

It's my experience that price is moot. You may want to get 2 or 3 cheap ones so you can compare them with each other over time to make sure you're not working with a meter which has lost it's accuracy.

Calibrated meters cost the same as the uncalibrated meter plus $150 additional for the certificate of calibration, and then there's an annual recertification.

Hope this helps.
 

greenspark1

Senior Member
Location
New England
@mgookin- that helps tremendously, thanks for the valuable info! We are doing fairly basic light measurements and even 10% accuracy will be fine. No calibration needed. Sounds like a $30 is the right choice, maybe two of them.
 

LEO2854

Esteemed Member
Location
Ma
@mgookin- that helps tremendously, thanks for the valuable info! We are doing fairly basic light measurements and even 10% accuracy will be fine. No calibration needed. Sounds like a $30 is the right choice, maybe two of them.
Sounds good to me too.:)
 

cubdh

Member
"mgookin" What type of light meter would you recommend for testing LED streetlight lux levels. This is to compare different LED manufacturers lux output as per "The ANSI/IESNA RP-8-00 Roadway Lighting Standard"
I have read that some light meters do not accurately measure the perceived illuminance of LED lights.
 

mgookin

Senior Member
Location
Fort Myers, FL
Overkill.

You can get a calibrated lux meter that is also a data logger for a few hundred dollars.

But you should also be able to get that information from the luminaire manufacturers.

And there's software out there which will do it for you so you don't have to go out and buy lights and set them up. There are also plenty of consulting firms who will do it for you if you don't want to take the time to buy, install and learn how to use the software.
 
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