50% efficiency is pretty massive for a light or most anything really. And you can get higher if you underdrive them. Just because a light appears white doesn't

50% efficiency is pretty massive for a light or most anything really. And you can get higher if you underdrive them. Just because a light appears white doesn't mean the spectrum is evenly distributed though, generally if you graph the color spectrum of these lights green is in a huge dip. If you go to page 13 of this data sheet they show show spectrum graphs. https://cdn.samsung.com/led/file/resource/2020/09/Data_Sheet_LM301B_CRI80_Rev.10.1.pdf https://cdn.samsung.com/led/file/resource/2020/09/Data_Sheet... All of which appear white in real life. They may be more cool blue white or warmer reddish white, but white nonetheless. Especially with the intensity that they shine.