As far as I know, the 13 inch F10T8 tubes have an arc voltage drop of about 45V and an operating current of about 230mA according to Japanese catalogs I have read through.

What part of the process you think is hard? Lighting a CFL lamp?

Anyway, you always can ask a computer literate friend or your father etc to help.

 

I've seen in Youtube how to calibrate the little garden spectroscope, and it is very hard to me to do.

Here is a photo of mine https://www.lighting-gallery.net/gallery/displayimage.php?album=lastup&cat=14865&pos=1&pid=268131

It is the same length as my F10T8s but yeah I also don't know their specs. With the unusually sized tubes length sometimes varies between brands. I looked up a lot of things like "NEI F12T8" and stuff but there was nothing.

This prevents me to use them, as calibrating a spectrometer is very hard. almost like piano tuning, and requires special technicians...

Who said it is hard? For Little Garden it is as easy as finding a couple of reference peaks from a familiar light source like a CFL and adjusting them to their proper wavelengths, just to align spectrometer scale to the exact wavelengths. A 5 minutes job.


You likely can't calibrate amplitudes (=powers) properly at all on any webcam spectrometer of such class, so no reliable CCT/CRI no matter how hard you try, but yeah you'll still have a heck of fun with hi-res spectrums for $60 spent!

Firstly because every individual spectrometer is slightly different.  Secondly because the measured values are strongly influenced by how the light gets into the spectrometer.  Intermediate accessories like optical fibres, diffusers, integrating spheres etc also all have their own unique spectral transmission and reflection curves.  The complete system always has to be calibrated with a known reference lamp to take account for all these variables.

Writing it writing is one thing. Second thing is if even anyone is even interested.

Like for an example, Polish streetlighting only has like 5 members interested in this looking at the day today. And only 2 polish websites were made from what I had seen. At the other side when I look at English streetlighting, There are many members around. I at least seen more than 3 websites made that are related to UK Lighting.

On the other side. Here is what I see. English, and American lights are just popular on this site. It's the French side, Belgium side, Netherland side, German, Poland, Czech, and MANY MORE, there isn't much interest, only a few people sit in it. I'm surprised that at least 2 other members replied to it, though I wonder how many people are actually interested in this post, just hadn't commented because they did not want to, or just are guests...

Other else, I'm just grateful that at least one member, or a few in past, thought about do something like this. Like I'm impressed Tbh. I kind of wanted to do it with Polish side, but I feel like there is no need at the moment.

Crappy no-name yard light for LED yard blaster.

@PabTheSpanish oh, thanks! I liked writing!

@RRK, @James, @Medved?