This is a little wonder I’ve had with me for a while now, the 4Sevens Quark Mini CR2.
This thing is 2 inches long by 0.75 inches wide, so small it disappears in any pocket and can be easily carried daily by even the most weight or bulk sensitive person.
In spite of being so small it has low medium and high output of 180 lumens. In low mode it lasts for over a day and it has strobe, SOS and beacon as hidden modes as well.
The only issue is that CR2 batteries aren’t readily available so you’ll have to stock up on line, yet for the minimalist preper this one is hard to beat. Its available at 4Sevens website and costs $39.
Take care guys!