LUX Meter

BigEasy1

Well-Known Member

Jan 18, 2015

• #1

Anybody know if this meter will work with LED lighting? I've been reading contradictory reports on LUX meters being accurate with LED. I don't need anything fancy. Just an accurate LUX reading.

http://www.amazon.com/Dr-Meter-Digital-Illuminance-Light-LX1330B/dp/B005A0ETXY/ref=sr_1_3?ie=UTF8&qid=1421575017&sr=8-3&keywords=lux+meter

Thanks for your help.

 

SupraSPL

Well-Known Member

Jan 18, 2015

• #2

It will give you a general idea and will be very precise, but not geared toward photosynthesis so cannot be used to compare light sources of different color temps.

 

Last edited: Jan 18, 2015

BigEasy1

Well-Known Member

Jan 18, 2015

• #3

SupraSPL said:

It will give you a general idea and will be very precise, but not geared toward photosynthesis so cannot be used to compare light sources of different color temps.

Click to expand...

Do you recommend one that is geared towards photosynthesis? I'd like to compare it against the cheaper version to see what the differences are. Thanks

 

captainmorgan

Well-Known Member

Jan 18, 2015

• #4

Something like this or just the sensor and use a multimeter.

http://www.apogeeinstruments.co.uk/mq-200-quantum-separate-sensor-with-handheld-meter/

http://www.apogeeinstruments.co.uk/sq-120-electric-calibration-quantum-sensor/

 

SupraSPL

Well-Known Member

Jan 18, 2015

• #5

They are selling for 335 on ebay, but keep in mind they are mostly blind to deep red wavelengths and there is a significant deep red output in warm white COBs, especially 3K Vero.

 

captainmorgan

Well-Known Member

Jan 18, 2015

• #6

SupraSPL said:

They are selling for 335 on ebay, but keep in mind they are mostly blind to deep red wavelengths and there is a significant deep red output in warm white COBs, especially 3K Vero.

Click to expand...

Yea I think if you want a real good one it's a couple grand.

 

BigEasy1

Well-Known Member

Jan 18, 2015

• #7

Yea, better go with the Amazon $32.00 model. I just need a general idea. Thanks for the input.

 

captainmorgan

Well-Known Member

Jan 18, 2015

• #8

I bought just the electric sensor for $155 and use my multimeter,you can really dial in your distance from the plant quickly and think it was well worth the money.

 

medicinehuman

Well-Known Member

Jan 18, 2015

• #9

Has anyone seen or used this http://www.specmeters.com/lightmeters/quantum-meters/
http://www.licor.com/env/products/light/quantum_sensors/

 

Last edited: Jan 18, 2015

Greengenes707

Well-Known Member

Jan 18, 2015

• #10

They are not blind...just have to rely on educated guessing for certain parts.
http://www.licor.com/env/webinars/webinar_4-20-10.html?form=1

I have tested a few spectrums , 3K cobs being one of them, with a li-core and apogee(calibrated on AT spectrum), and a standard apogee. All are very close to each other...within 3-5% even on deep red heavy spectrums.

 

SupraSPL

Well-Known Member

Jan 18, 2015

• #11

This is what I mean by blind to deep red, both of the spec sheets show almost no response above 650nm. They admit that adjustments need to be made for electric light sources.

Apogee:


Lightscout:

 

Last edited: Jan 18, 2015