Spectrum matching with Lux meter

[Maximitsurugi]

Question @saltyfilmfolks @Dana Riddle .

I have 2 different brand lights over a tank. I have the radion XR 15 blues and a Hydra 52HD.

Can I get the spectrum of the Hydra close to the XR15s by Lux metering each channel individually? Like I meter only the Royal blues of the Radion then try to match the intensity of the Royal blues on the Hydra etc?

 

[oreo54]

Hey, give it a shot..
One thing though your nm peaks may not exactly match.
Like 420 violets vs 410 violets not even considering manuf err "allowances" of peak wavelength.

LUX meters also weak in blue and red accuracy since it is not primarily the spectrum of concern.

I would think, as long as you have channels relatively closely matched you could do a relative par match (close to each other not close to actual) better than a eyeball spectrum match due to mis-matched frequencies.
PAR goes by numbers of photons not what they look like.

Either way though, lot of room for errors.

 

[GHOSTLY]

Bump

 

[Dana Riddle]

Question @saltyfilmfolks @Dana Riddle .

I have 2 different brand lights over a tank. I have the radion XR 15 blues and a Hydra 52HD.

Can I get the spectrum of the Hydra close to the XR15s by Lux metering each channel individually? Like I meter only the Royal blues of the Radion then try to match the intensity of the Royal blues on the Hydra etc?

Here, in this article, are a few lux to PAR conversions. Hope this helps some.

Aquarium Equipment: PAR Meters and LEDs – How Accurate are the Measurements? A Comparison of Three Meters and Lux to PAR Conversion Factors for LEDs

How do PAR meters stack up to one another? Dana delves into the data comparing and contrasting three light meters and gives us his take on the results.

reefs.com

 

[Maximitsurugi]

Here, in this article, are a few lux to PAR conversions. Hope this helps some.

Aquarium Equipment: PAR Meters and LEDs – How Accurate are the Measurements? A Comparison of Three Meters and Lux to PAR Conversion Factors for LEDs

How do PAR meters stack up to one another? Dana delves into the data comparing and contrasting three light meters and gives us his take on the results.

reefs.com

Thanks Dana but I was more looking to get spectrum close vs Par close.

 

[oreo54]

Thanks Dana but I was more looking to get spectrum close vs Par close.

Your eyeball will work better than a lux meter.
Lux meter may work for a coarse adjustment

MEGATRON - for measuring light - gp-instruments

Megatron for measuring light - gp-instruments

www.otc.co.uk

 

[oreo54]

• 12 - Cree XP-G2 Cool White (> 70 CRI)
• 12 - Cree XT-E Royal Blue
• 12 - Cree XP-E2 Blue
• 4 - OSRAM OSLON Deep Red
• 4 - Cree XP-E2 Green
• 4 - SemiLED 415nm
• 4 - SemiLED 400nm,...........

LED Details

• 3x Cool White
• 20x Royal Blue
• 12x Blue
• 1x Photo Red
• 2x Lime
• 2x UV (405nm)
• 2x UV (415nm)
• 3x Violet
• 5x Cyan
• 2x Lunar Light

Diodes on each.
Pretty different. Look matching would be challenging.