alt Hacker NewsThe description of LEDs as a monolithic device makes me strongly doubt the conclusion reached. Alas, there's no link to the paper to see how they addressed the wildly varying types of LEDs and why other types of bulbs emitting a similar spectrum wouldn't have the same issue.
Edit: oh jesus, this article is from 2013.
This appears to be the paper: https://hal.science/hal-05385645v1/file/Monico%202025.pdf
[edit]: this is clearly not the paper, as it was published in 2025, and the hn link is from 2013. Regardless, it makes only passing mention of commercial LED, certainly nothing that supports the claims in the article, nor does it mention in the paper body anything that appears to be referencing previous analysis of the lighting, so the search continues.