heat emitted by LED signs and lights.

[chand kewalramani]

i am chand kewalramani. i have question that how much heat is emitted by LED signs and lights. Has anybody measured it.
it is commonly said they emit less heat but how much less. what is the measurment? how much percentage wise less? is there any scale to measure it?
chand

 

[Alec_t]

Welcome to EP!

how much heat is emitted by LED signs and lights

(1-e)*p, where e is the sign/light efficiency and p is the input power.

Has anybody measured it.

Yes. Ask a sign/light manufacturer.

how much less

Conventional sign/light power (CP) minus LED power (LP).

what is the measurment?

Probably Watts.

how much percentage wise less?

100*(CP-LP)/CP.

is there any scale to measure it?

It's a percentage

 

[duke37]

The heat emitted can be estimated from the power input. Most of the input will be output as thermal energy, some will come out as light.

 

[AnalogKid]

Are you asking about the heat produced by the entire display system (power supply, control electronics, drivers, LEDs) or just the LED emitters themselves?

ak