Hi,

I have a LED with 3.29V drop and at 350mA. Therefore the input power is 1.15W. It also lists the Pout (output power) as 458mW. I'm thinking this value refers to the optical power but i'm not certain. Can anybody provide some input to this?

Thanks.

 

I guess what u have is a 1W led.

Optical power is measured mostly in amount of light output which is in lumen.

 

send me your data sheet........

 

send me your data sheet........

What for?

Better to ask for the LED

 

I imagine it is talking about thermal dissipation.

 

I imagine it is talking about thermal dissipation.

HUH!!! thermal what ?

 

Thermal dissipation is how much power it can get rid of as heat to the surroundings - exceeding it makes it overheat.

However, I just searched for the numbers and got this:
So I think I was wrong, it is probably the optical power output - not usually quoted for visible LEDs, but often used for IR leds.

Nichia has also fabricated high-power white LEDs using large-size (1 ×1 mm) blue LED chips with an output power of 458 mW at 350 mA. White LEDs demonstrated a luminous flux of 106 lm at 350 mA, and a luminous efficacy of 91.7 lm/W. The forward voltage was 3.29 V and the WPE value of 27.7% is greater than that of a fluorescent lamp (25%) in the visible region. The correlated color temperature of the high-power white LED was 5450 K.

http://www.ledsmagazine.com/news/3/11/22