Emergency lighting is there to help you find your way out in the dark without any problems. When the power goes out and you are in a building unfamiliar with the surroundings, you can no longer see where the emergency exit is. It is difficult for everyone to find the shortest route to the exit of the building when it is pitch dark. Panic spreads quickly. Emergency lighting is then very important so that the escape route is immediately clear and people can safely leave the building. 

Constant current output was once the normal mode of LED emergency power supply, and now the mainstream output mode has been upgraded to constant power mode.

The biggest advantage of the constant power mode is that it can self-adjust to suit different load's voltages, and we make the output voltage range very wide (10-60V, 60-300V), so that our emergency power supplies are extremely versatile. Benefit from the constant power output mode, we can advise a quick calculation of emergency output. Taking the 3 hours emergency duration as an example, a single 26650 cell (or 2 18650 cells) can provide about 2W emergency power (approximately equivalent to 250lm output).