The Nichia 519A is a one of the favourite LEDs in the enthusiast flashlight world.

It's a high CRI quite bright LED, and I have to shamefully admit that I specifically specced a light in the past with this LED.

Before I knew about this, that is.

Example write-up to see what flashlight nerds talk about: https://budgetlightforum.com/t/nichia-519a/64360/43