Although my measurements were not very scientific, I noticed that they are not bad in the M200.
However, the drain on the m150 is only big IF you lock the light electronically leaving the red led indicador ON.
Otherwise, it doesn’t seem to be a problem!
If I could find any of the 18 meters I got somewhere, I’d check.
Nice light but can the clip be reverse aka deep pocket carry?
Nope.