There are plenty of evidence that the activation of ipRGC inhibits melatonin production.
My question was about the "ratio of yellow photons to blue photons".
Fun fact: Blue light can stimulates melanogenesis in dark-skinned individual (type III and above) [1], no UV required. This process is mediated by an Opsin, like our vision.
This is a somewhat recent discovery (~2010) and the physiological effects are still largely unknown. Most studies on the subject are concerned about hyperpigmentation and oxidative stress.
My question was about the "ratio of yellow photons to blue photons".
Fun fact: Blue light can stimulates melanogenesis in dark-skinned individual (type III and above) [1], no UV required. This process is mediated by an Opsin, like our vision.
This is a somewhat recent discovery (~2010) and the physiological effects are still largely unknown. Most studies on the subject are concerned about hyperpigmentation and oxidative stress.
[1] https://www.sciencedirect.com/science/article/pii/S0022202X1...