PARwise

telegraham · Dec 17, 2023

telegraham said:
its accuracy is greater than

Oops...its accuracy is less than...

Nonya · Dec 17, 2023

telegraham said:
You are using a PARwise to show me that the peaks don't match the advertised spectrum? Suggest using an alternative spectrometer. You'll find that using the PARwise to defend your position is unwise, as its accuracy is greater than the diodes you're attempting to smear.

You're absolutely right, your multi-LED spectral measurement differs. Sorry if my "amateur" measurements are somehow insulting to you. I don't appreciate you calling the piece of equipment I and other hobbyists are using "crap". It suits my purposes. I've grown tired of this kind of self-important elitist attitude in a hobby I've loved for decades. I have had a number of successful reef aquariums without the need to tell everyone that I spent $XXXX on a piece of equipment that contributes zero to the health of my tank. As far as being able to identify small peaks in an entire spectrum, neither you nor anyone else can say that an insignificantly small peak at 460nm is a significant feature that will have X affect on your Oregon tort. Good enough is good enough.

So...What I have found, however, is that I can measure any number of individual LEDs and get exactly the same measurement with each LED no matter how many times I measure them--down to the nanometer. So no matter how far off "truth" it is, it's been incredibly consistent.

The measurements I provided were for single wavelength, single element LEDs. For my DIY purposes, that's all I need. I have a friend duplicating my measurements with lab-grade equipment. If he determines I have some built-in bias, I can compensate for that.

Nonya · Dec 17, 2023

telegraham said:
Here's how far off the PARwise is from an actual spectrometer. This is my data, not something found online. Same light, same conditions, but different spectrometers. One is good, one is crap. What I don't understand is why the PARwise software hasn't been adjusted to eliminate the chopping of the peak spectrum and the left shift of its data. That should be an easy fix, but it has been that way since its release.

Yep. They're definitely different. What exactly was measured?

telegraham · Dec 17, 2023

crit21 said:
Sorry if my "amateur" measurements are somehow insulting to you.

Not at all insulting, but your "proof" is faulty. Grab a Hopoocolor or UPRtek. Best that you learn from your own experience.

slayerhellfire · Dec 17, 2023

Dburr1014 said:
Interesting

PARwise is a New Light Sensor from ITC ReefCulture | Reef Builders | The Reef and Saltwater Aquarium Blog

PARwise is an intelligent new light sensor from ITC Reefculture which aims to help shed some light on what is going on in our aquariums. The new PARwise appears to share some DNA with the Seneye from…

reefbuilders.com

excellent product!

Nonya · Dec 17, 2023

telegraham said:
Not at all insulting, but your "proof" is faulty. Grab a Hopoocolor or UPRtek. Best that you learn from your own experience.

Yeah, insulting and condescending.

AKReefing · Dec 17, 2023

telegraham said:
Not at all insulting, but your "proof" is faulty. Grab a Hopoocolor or UPRtek. Best that you learn from your own experience.

I'm interested. How much does it cost for the average person to "grab" each of those, and what are the best places to get them?

Nonya · Dec 17, 2023

AKReefing said:
I'm interested. How much does it cost for the average person to "grab" each of those, and what are the best places to get them?

Disregard. The Hopoocolor starts at $350 on Amazon, with one model at $1,000. The UPRTEK MK350S sells for $3,400??? Wow.

How much did you pay for your parwise? Asking for a friend, LOL.

telegraham · Dec 17, 2023

PARwise USB Light Meter

All the Metrics Needed to Make Informed Decisions about your Aquarium Light Compatible with any light source Can be used wet or dry Works with Windows PC, macOS*, and Android devices Measures multiple lighting metrics: PAR (PPFD – Photosynthetic Photon Flux Density µMol/m2/S) Kelvin (Color...

www.bulkreefsupply.com

https://www.aliexpress.us/item/3256805504026945.html?spm=a2g0o.store_pc_allProduct.8148356.2.7a3d1d4c0ymAAI&pdp_npi=4%40dis%21USD%21US%20%24648.00%21US%20%24648.00%21%21%21648.00%21648.00%21%402101e58317028389697892851e983f%2112000034019360377%21sh%21US%212083784258%21&gatewayAdapt=glo2usa

MK350S Premium Spectrometer – Gamma Scientific

The MK350S Premium is a stand-alone, handheld multi-function spectrometer. In addition to a full range of spectrometer functions, it can also be used as a Quantum PAR Meter or an oscilloscope. Users can choose from more than 40 light measurement units. Data can be downloaded via USB or Wi-Fi...

gamma-sci.com

telegraham · Dec 17, 2023

crit21 said:
How much did you pay for your parwise? Asking for a friend, LOL.

$299, Premium Aquatics, 30 Apr.

ITC does not tout the PARwise to be a good spectrometer. It's just a PAR meter with spectrometer capabilities.

telegraham · Dec 17, 2023

crit21 said:
Yeah, insulting and condescending.

No. Simply accurate. I have what you're using. You're basing your position on faulty data. That ain't your fault.

Reefering1 · Dec 17, 2023

Excuse my ignorance..., but isnt the difference in most these measurements "close enough" given the price difference of the tools measuring them. For a manufacturer, I get it. But as a hobbyist, does that 5%(rough, in head, estimate) matter?

Reefering1 · Dec 17, 2023

And how does this pairwise do with halides, is it compatible?

Nonya · Dec 17, 2023

Aliexpress? That's where I got my Chinese LEDs!!! Too ironic, eh?

Nonya · Dec 17, 2023

Reefering1 said:
Excuse my ignorance..., but isnt the difference in most these measurements "close enough" given the price difference of the tools measuring them. For a manufacturer, I get it. But as a hobbyist, does that 5%(rough, in head, estimate) matter?

In my experience, yes.

Nonya · Dec 17, 2023

Reefering1 said:
And how does this pairwise do with halides, is it compatible?

I'm wondering why it would matter with halides. You can't adjust the spectra. You're pretty much stuck with what you have.

Reefering1 · Dec 17, 2023

crit21 said:
I'm wondering why it would matter with halides. You can't adjust the spectra. You're pretty much stuck with what you have.

It really doesn't matter. And I'm not stuck, I'm committed. There is a difference ;-) but it could be useful for determining bulb decline to determine when to replace bulbs. Or maybe to help blend supplement leds, to the spectrum better

Reefering1 · Dec 17, 2023

crit21 said:
In my experience, yes.

Yes it does matter? Why?

telegraham · Dec 17, 2023

crit21 said:
In my experience, yes.

Not when you're using that data to suggest that 450nm diode ain't 450nm. There's a better chance that your meter reading is off, not the diode. Diodes not matching the advertised spectrum was the basis or your entire argument.

I, too, get my cheap from Ali, but I'll also buy from Amazon. That's not a quality position, as I think you'd be quite impressed by the Hopoocolor. In some was, it provides more granular data than the UPRtek. That, and the read spectrum is wider.

BTW, if you're reading sub-400nm data with your PARwise, it most likely isn't there.

telegraham · Dec 17, 2023

Reefering1 said:
Excuse my ignorance..., but isnt the difference in most these measurements "close enough" given the price difference of the tools measuring them. For a manufacturer, I get it. But as a hobbyist, does that 5%(rough, in head, estimate) matter?

Given BRS' data, I'd like to see the spectrums align better. For me, it's just too far off to be of value, but I'd expect that tuning the result via software could be a thing. If they aligned those peaks, I'd absolutly recommend it for hobbyist use.