JI... the windlass type of tourniquets have hook and loop or clip openings that allow you to self apply... CAT and SOFF-T are some examples

pressure bandages.. most have a lever bar application where the tail bandage passes through a slot, then the direction is reversed to "cinch" the dressing to apply more pressure... emergency or Israeli are common names

occlusive dressing has a thin external "plastic" layer to help seal a thoracic puncture to allow the lung to function... Olaes

several companies like the mentioned 4Sevens make single CR123 powered pocket lights with 175+ lumen... Streamlight ProTac 1L, SolarForce Z1, or Fenix... my EDC Fenix E12 is a AA light with 130 lumen and 3 settings