> These lamps have two spectral peaks: a narrow peak in the blue range, around 450 nm, a broader peak in the green, centered around 580 nm. That greenish peak

> These lamps have two spectral peaks: a narrow peak in the blue range, around 450 nm, a broader peak in the green, centered around 580 nm. That greenish peak falls off sharply, and has almost no energy in the red end Check figure 1h in the datasheet of the LEDs author used https://otmm.lumileds.com/adaptivemedia/832eef99dd3139f98fa943e60565a2920b270d04 https://otmm.lumileds.com/adaptivemedia/832eef99dd3139f98fa9... The second peak is near 650nm and while it drops fairly quickly there is still decent amount of power at even 700nm. In short, they perform far better than your stereotypical crappy white LEDs.