It depends on the players group, and I am usually not asking them to keep track of something unless they start doing so. If the players don't go telling each other "we should have enough ammunitions before this quest", I am not asking them to keep count, nor I keep count secretly and then all of a sudden tell them they have no arrows left. If it doesn't come up spontaneously, it probably means the group has no interest in that possible aspect of the game, and probably wouldn't have fun if I forced them to. Ammunitions, rations, spell components, encumbrance* and mundane consumables like amount of light sources/recharges fall into this category for me.
I still voted for light sources there because I wasn't sure you whether you meant either keeping track of how many hours worth of torch usage (which I don't) or keeping track of where do the light sources available extend visibility to (which I do).
I do keep track of time and rest, because those are generally a lot more immediately intuitive to players as a resource.
I also keep track of mundane equipment that can make a difference, like ropes and poles, but usually only up to "do you have it or not?", and many useful tools are typically included in adventuring starting packages.
*I don't track encumbrance carefully but I may require some ballpark common sense, should anyway want to carry something big, heavy or unwieldy (like a fallen comrade)