Times when staff didn't follow best practices or local policies for new infra

[Bytor]

LEDs themselves of course emit a specific wavelength (blue) but in modern white LED lamps, the blue light is passed through a phosphor to adjust the spectrum to white, and the resulting light is very broad spectrum, far better than low pressure sodium lights (which we didn't use, but are common in some places) and certainly not worse than high pressure sodium lights (which we did use before).  They are a higher colour temperature which does affect one's perception of brightness.

Given what we already knew when the decision was made by Kitchener to start using these LED lamps about how bluer light screws with your circadian rhythms and increases the risk of many diseases, I'd say that they are definitely worse than the old orangey sodium lights in that regard.