You can get LEDs which mimic the spectrum of natural light more closely, but these are usually specialty products (often specifically branded as sun-like). Here's one example https://www.greesled.com/wp-content/uploads/2024/11/ab24a411...

In comparison, the LEDs chosen by the OP have a fairly poor power distribution spectrum. At 4000K the color temperature is also too low to mimic daylight, which is at around 5500K. This is all well as an artistic choice but probably doesn't get you any benefits for seasonal affective disorder.