The emergency lighting time of emergency LED lights depends on factors such as battery capacity, lamp power, usage mode and environmental conditions, as follows:
1. National standards and common emergency times
China GB 17945-2010 standard requirements:
Fire emergency lighting: ≥90 minutes (usually 90~180 minutes).
Evacuation indicator lights: ≥90 minutes.
Actual product range:
Basic type: 30~60 minutes (small home or low-cost models).
Standard type: 90~180 minutes (mainstream configuration for commercial and public places).
Long-lasting type: 3~6 hours (special needs, such as hospitals and data centers).
2. Core factors affecting emergency time
Factor Influence description
Battery type Lead-acid battery (low cost, but short life) vs lithium battery (lightweight, many cycles, longer life).
Battery capacity For example: a 1200mAh battery supports about 1 hour under a 3W lamp, and a 2000mAh battery can be extended to 2 hours.
Lamp power The lower the power, the longer the battery life (e.g. a 1W lamp lasts 2~3 times longer than a 3W lamp).
Ambient temperature Low temperature (<0℃) will significantly shorten the battery life of lithium batteries (may reduce by 30%~50%).
Aging degree The capacity of the battery decreases after 2~3 years of use, and the emergency time is shortened (regular testing and replacement are required).
3. Emergency time recommendations for different scenarios
Home use: 60~90 minutes (to meet short power outages or initial escape from fire).
Shopping malls/office buildings: ≥90 minutes (in compliance with fire regulations, covering the evacuation time of personnel).
Hospitals/subways: ≥180 minutes (to ensure continuous guidance in complex environments).
4. User precautions
Regular testing:
Manually trigger the emergency function once a month to check whether it can be lit and timed normally.
Replace the battery after aging (such as battery life <70% of the nominal value).
Energy-saving mode:
Some lamps automatically reduce brightness in emergency situations (such as from 10W to 3W) to extend battery life.
Installation environment:
Avoid high temperature (>40℃) or humid environment, otherwise it will accelerate battery loss.
(The actual time needs to take into account circuit loss, which is about 80%~90% of the theoretical value).
Tip: When purchasing, you need to confirm the emergency time test conditions marked on the product (such as full power/half power mode), and give priority to products that comply with fire certification (such as CCCF). you can consult more information on https://www.benweilight.com/lighting-tube-bulb/special-t8-led-tube/emergency-t8-led-tube.html
