Every story and comment from the Hacker News API, in a layout borrowed from 2001.
A comment on Declining eyesight improved by looking at deep red light. Parent comment
Just select one that has the one you are looking for, it's going to be cheaper and easier than getting an expensive or inaccurate spectrometer.
For instance, this classic one is at 660nm:
https://www.mouser.com/ProductDetail/Lumex/SSL-LX5093SRD-D
There are no comments on this comment yet.
Just select one that has the one you are looking for, it's going to be cheaper and easier than getting an expensive or inaccurate spectrometer.
For instance, this classic one is at 660nm:
https://www.mouser.com/ProductDetail/Lumex/SSL-LX5093SRD-D