system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: why do LED torches have multiple small LED's instead of one big one?
gpt
Some of them (the nice, expensive ones) do have a single LED, such as Mag-Lite.  Low-output LEDs are much less expensive to produce, so cheap flashlights often will have 25-50 of them (a dead giveaway is their very bluish tint); their overall light output is typically less than those with a single LED.  When purchasing, look for how many lumens the flashlight produces, not how many LEDs; more lumens = brighter.