Important to note that this was done with dilated pupils, so the difference is seen in a condition not normally encountered. Overall, I think the focus should

Important to note that this was done with dilated pupils, so the difference is seen in a condition not normally encountered. Overall, I think the focus should be on light spectrum, not LEDs per se. Warmer LEDs has far less direct emission, with most of the light being re-emitted from the phosphor.