you could try LEDs made with phosphor. a few companies including waveformlighting (unaffiliated: https://www.waveformlighting.com https://www.waveformlighting.c

you could try LEDs made with phosphor. a few companies including waveformlighting (unaffiliated: https://www.waveformlighting.com https://www.waveformlighting.com) offer them.