Saturday, 9 December 2017

power - Why are these LEDs listed as 3W when the forward voltage is 2.4V, and forward current is 700mA?


The title of this listing says 3W:


http://www.ebay.com/itm/50PCS-3W-RED-80lm-640nm-LED-Plant-Glow-Light-Emitter-with-20mm-star-base-/221518318191?pt=LH_DefaultDomain_0&hash=item3393854a6f


But the specs that follow show a forward voltage (max) of 2.4V and forward current of 700mA. Wouldn't the power in this case be 2.4V * 0.7A = 1.68W and not 3W?




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