There is no filtering of the led lamps possible, as they use phosphors to produce near continuum light. HPS at least had a collection of discrete lines you cou

There is no filtering of the led lamps possible, as they use phosphors to produce near continuum light. HPS at least had a collection of discrete lines you could avoid. LED lightning even taints 3nm wide emission line astronomy. But astronomy can cope with light polution-- so long as it's relatively constant it can be calibrated out (leaving only its shot noise). The human eye can't, but most people don't know what's been taken from them.