Yeah it’s a problem I’ve encountered too. Tint variation, even for a GA3 tint supposed below BBL, is quite large.
There are samples of the SST-20 3500k that are just on the BBL at 1 amp, while others are better in this regard.
This what halted me in my search for 4000k SST-20s and LH351Ds:
I need to order pick 5000pcs to customize tint bins, but without the ability to customize flux bins.
The 3500k from Mouser was a stroke of luck on my part, along with the 3000k sample.
A Gossen Mavospec Base, which is a handheld spectrometer targeted to the professional lighting market (but is bought every now and then by a hobby freak). There is similar devices around by Sekonic and other brands.
I've read elsewhere that brass screws can be purchased for the Q8, and will also help get you a bit more brightness. I would definitely recommend XPL-HI or XP-L2 over the stock XP-L.
Oh man the DUV is very disappointing. I was hoping it will be -.008 DUV with bare LED so even with optics, it would still not be green.
BTW, I’ve been considering buy a spectrometer for a long while but haven’t yet because of the price. Maybe in the future I will. Why did you choose the Gossen Mavospec Base over Sekonic or any other brands? How does yours compare with Maukka’s spectrometer?
I’m not sure how maukka’s measuring setup is done, it is not a handheld spectrometer like mine but works via a computer, and possibly an optical fiber is used to collect the light.
And I did not do an extensive search for the best, cheapest or most versatile spectrometer (the Sekonic C700 is cheaper and more versatile, not sure about quality and accuracy, should be ok too), the Gossen spectrometer was recommended and sold to me by a dutch lighting company that also very friendly helped me with calibrating my luxmeter last year. Call me lured into this one
Handheld seems more versatile since you can measure any light source including ceiling light fixtures. I will look into the Sekonic. I also want it to have decent spectrum reader so I canuse it to help me minimize blue wavelength lighting in my bedroom. The E21A 2500k with majority red wavelengths seems to really put me to sleep compared with other lights Ive used at bedtime
I think it’s expected to take the slow boat. So probably several weeks. I may be remembering wrong though. Maybe BlueSwordM will step in and answer.
EDIT: I was curious myself, so I looked back at the first spring order. Blue made the order and sent payment by 7-07 and had the springs in his possession by 7-30. That’s 23 days.
Shipping itself is very fast, but making the springs and electroplating them takes more time, as I’ve discovered that they don’t do silver plating on site, unlike nickel and tin.