Light output, measured in lumens. Most tactical flashlights put out 60+ lumens, while some go up to 1,600+. Comparatively, most regular flashlights put out just 15-20 lumens. Run time, which references how long it takes for the battery to reach 10% of its initial output. Ex: How long it would take a 100 lumen flashlight to reach a 10-lumen output.
Histology of compact bone showing osteon. Each osteon consists of concentric layers, or lamellae, of compact bone tissue that surround a central canal, the haversian canal. The haversian canal contains the bone's blood supplies. The boundary of an osteon is the cement line. Between adjoining osteons, there are angular intervals that are occupied by interstitial lamellae. These lamellae are remnants of osteons that have been mostly destroyed.
(3)Osteocytes (in lacunae)- maintains the bone matrix and are stress/strain sensors.  (4)Canaliculi-hairlike canals that tie all osteocytes in an osteon together so they all get nutrients and dispose of waste.  note: lamellae fills the gaps between forming osteons and helps resist twisting in the long bone(s).