Question About LEDs

[360º]

so i bought this LED "worklight" that ran on 3x AAA batteries(4.5 volts).

i took it apart and hooked it up to a variable voltage power adapter.



so at 4.5 volts it works exactly the same as it did with the batteries..... but as i increase the voltage, the LEDs get brighter.

at 9 volts they seem to be almost double the brightness.

my question is, will the increased voltage wreck the LEDs or something else on it?

[Mike-words]

Possible, but it depends on how the bulbs are wired.