I have not had the opportunity to test the Nightwatch NA40SE. I will give other results of tests, maybe they will give data for analysis: 24°C of the medium

Sofirt C8F 3*XP-L(990Lm) – 58°C 20 minutes later. And (650Lm) 50°C 20 minutes later.
Sofirt SP33 1*XHP50.2(1000Lm) – 41°C 20 minutes later and 47°C 60 minutes later.
BLF Q8 4*XP-L(~1100Lm “Group6-Mid2”) – 47°C 20 minutes later.
Acebeam EC65 4*XHP35HI (800Lm) – 52°C 20 minutes later and 65°C 60 minutes later.
YLP G180 9*XP-G2 (800Lm) 45°C 60 minutes later. And (1400Lm) 69°C 60 minutes later.