The ML25 was a bit of a throwback light by Maglite in 2016 that was seen as a C sized minimag.
Much like the classic Maglite, it was a thrower. At less than 200 lumens it has over 12k candela as it throws out a pencil beam a lot farther than the lumen number would suggest.
The 2C was regulated for rock solid output for 2 hours then quickly dims to about 10% output. The 3C was rated for 17 hours of output and would still be around 50% at that point, then dims to about 10% after another hour.
They released an incan version as well, but most stores did not carry those.
With the ML25 you can use the tailcap for on/off or signaling. Set the beam like you like and a half turn of the tailcap cuts the power. A bit less allows the user to press on the tailcap for signaling.
Many folks use aa adapters and eneloops for fuel for a nice lightweight light for dog walking, putting out the trash etc.
Around here there wasn't a lot of excitement about the ML25, but the Maglite fans here were certainly happy to obtain the maxi-mini-mag.
When they first showed up at my local Wal Mart there were a bunch of zeros to the left side of the serial number and it appeared they'd produced at least 10,000 at that point. The current crop at my local Wal Mart have a one to the far left of the serial numbers indicating some 10 million plus may have been produced.
No special colors were sold at stores but there were some Christmas, and patriotic versions produced that were sold by Z Battery (and perhaps other online stores).
A word of caution about alkaline batteries and leaking. If you gift them caution the gift-ee to store batteries outside of them. The Duracells they used to come with leaked.
Also it seems Maglite has come out with a 2 level version but details are sketchy at this point.
Evidently Maglite's contract with WalMart and Lowes have not been renewed. Home Depots seem to be restocking the Maglite's.