Mag-Lite 499116BK

The most common lithium-ion cell is the 18650 (the numbers define the physical dimensions and shape as follows: 18mm in diameter, 65mm long and the 0 means it has a round cross-section) which is due to its widespread use in laptop battery packs.

The different types of lamps include:Incandescent Lamps,Tungsten Halogen Lamps,Fluorescent Lamps,Compact Fluorescent Lamps,Mercury Vapour Lamps,Metal Halide Lamps,High Pressure Sodium Vapour Lamps,Low Pressure Sodium Vapour Lamps.

The quantity of light that leaves the lamp, measured in lumens (lm).