This is expressed as:
Lamp switch, full brightness. So lamp off and on again, the lamp will start with next modes, so less light etc. It has after every turn on the next modes. What a bullshit.
If I now evening in complete darkness a card in the darkest stage, which is quite sufficient in this case, read, then turn off the lamp, I will the next time the card read directly at full power strobe flashed. Either I am blind or then to puke.
So for me absolutely useless.
Too bad, because this light has given me better liked than the EasyAcc flashlight 500LM 3-in-1. Larger cone of light and bright.
Batteries and charger I have not even tried.