Author Options:

recommendation for LED brightness? Answered

I am making an LED suit that has to be visible in low-light environments, like night or in a cave. (fog, smog, and rain not taken into account)

any recommendations for a good brightness? how many lumens?

it has to be visible so a car can see the wearer of the LED clothing, so the wearer doesn't get hit.


The forums are retiring in 2021 and are now closed for new topics and comments.

Best Answer 5 years ago

Take your clues from the standard requirements for riding light for a bicycle.

Front Lamp

One is required, showing a white light, positioned centrally or offside,
up to 1500mm from the ground, aligned towards and visible from the
front. If capable of emitting a steady light it must be marked as
conforming to BS6102/3 or an equivalent EC standard. If capable of
emitting only a flashing light, it must emit at least 4 candela.

You can assume that any light meeting the spec BS3648 will be bright enough to be seen.


5 years ago

I just assume the driver of the car is sane...
So why not simply use reflective strips on the clothing?
Most packpacks and outdoor clothes already offer them anyway.
Just a few 2cm wide strips on several places around the body will illuminate you like a xmas tree if a car with headlights on comes along.


Answer 5 years ago

thanks for the answer

. i cant use reflective strips because it needs to light up in the dark without an external source of light.