Spectrometer and new COB

Olive Drab Green said:

I have no idea, bro. I don’t own a factory.

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Haha aight was just curious. The biggest issue with leds for general lighting use is looking straight into the diodes, so I was just imagining people doing that with COBs and blinding themselves lol. But I guess if it's like 20-30 feet above, it wouldnt blind you.

Dave455 said:

used for street lighting.........

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high bays, stadium lighting, street lighting, mall/store/restaurant spot lighting etc

this just popped up on ebay for $599 (no affiliation)

not the latest model but fine for most people's purposes

https://www.ebay.com/itm/183253248248?ul_noapp=true

http://www.aibcusa.com/portable-led-light-spectrometer/comparison-of-mk350-and-mk350s

man, i sure wished they made an economical spectrometer, but then again, if they did, it would drastically cut retailer bullshit across the board.

i like the handheld one like a phone size, simple

thats about as cheap as they get, and is a bargain for that feature set, imo

O, i agree..

make some DIY and sell them for $300, BWHAHA

Or get a kit: https://publiclab.myshopify.com/products/desktop-spectrometry-kit-3-0?variant=7183158980
https://publiclab.myshopify.com/collections/spectrometry/products/papercraft-spectrometer-intro-kit?variant=6100877213724

Or try a "cheap" spectrometer board from Tindie or groupgets etc:

http://www.tricorderproject.org/blog/sneak-peek-3d-printable-mini-spectrometer/

Ive made one in the past, 2 actually. couldnt get the software optimized correctly for some reason. I also made the cereal box/cd, ..

here is a pic of the spectrum thru the cereal box, and my modded Mars300. Cyan is the magic wavelength. These were just 30 days from seed i believe.

I used the Spectral workbench.This does calibrate the wavelength, but not for the spectral sensitivity of the webcam.

Cree 3000K 80CRI:

It sort of looks similar with the blue, green and red peaks in the correct locations, but it also looks very different to the SPD in the datasheet. For instance, the SPD in the datasheet does not dip like that around the 580nm. Also the blue peak is way too high and the green peak too low.


Osram 730nm:

The color is completely off (a webcam is probably not well equipped to capture far red), but other than that this seems reasonably close to the datasheet.