Exactly, Mascaratum B, (great many thanks for the assist !!)
the Blue (look cyan to my eye) “auxiliary” LEDs inside the Emisar D4S! It’s a fantastic idea IMHO.
Similar in concept to a lighted tailcap switch, an always-on option for locating the light in the dark.
Here is the link, witness the first photo...
https://budgetlightforum.com/t/-/52204
http://toykeeper.net/torches/emisar-d4s/full/auxleds-direct.jpg
