the difference is much larger… 1000 lumens becomes 644 lumens
to compare these two TCR-1
I put the two different heads on the same body tube with the same battery, and measured their outputs on my light meter.
The High CRI decreased lumens by 36, while increasing Red output by 400
since I almost never use more than 200 lumens, maximum is irrelevant to me.
I will take the High CRI every time
==
another actual lumen test before and after
AA Tool w stock CW LED
5
32
153
300
AA Tool w sw45k
2 lumens
15 lumens
73 lumens
175 lumens (42% drop)