jeffreyliu838
Newly Enlightened
- Joined
- Dec 28, 2007
- Messages
- 34
How many lumens does it take to damage the eye? Will direct exposure to 300 lumens do any damage within like 2 minutes?
Thanks.
Thanks.
It's not lumen you are looking for, it is how many lumen is emitted for the available emitting area. For example, a laser is low in lumen, but because it creates a lot of light from a tiny area, it can damage human eyes.How many lumens does it take to damage the eye? Will direct exposure to 300 lumens do any damage within like 2 minutes?
Thanks.
It's not lumen you are looking for, it is how many lumen is emitted for the available emitting area. For example, a laser is low in lumen, but because it creates a lot of light from a tiny area, it can damage human eyes.
A 10 lumen laser will have a much much higher change of damaging your eyes then a 10000 lumen flood light (I'm thinking of multiple florescent tubes behind a diffuser).
The amount of UV an LED can give off is surprising! Just tested it out with a calibrated Radiometer at 320 to 400nM frequency (UV-A)...
My terralux 140 Lumen comes close to 900 uW/cm sq (microWatts per centimeter squared) at point blank
my Fenix LOD comes close to 120 uW/cm sq point blank
TK 40 on turbo: about 710 uW/cm sq point blank (the terralux is bluer in comparison and TK 40 has wider beam)
The amount of UV an LED can give off is surprising! Just tested it out with a calibrated Radiometer at 320 to 400nM frequency (UV-A)...
interesting, cataract
do you have any access to blue leds or actual UV leds for testing?