05-04-2012, 12:27 PM
Join Date: Jan 2012
| | Re: My nano tank with my diy Led light
we calculate the consumption of the led light.
The image shows the working point of an LED (extract from Cree XP-G led datasheet). Each LED is powered by a constant current of 700mA. With this current, the voltage across an LED is equal (approximately) to 3.2 Volt.
The power consumed by each LED is given by:
P = I(current) x V(voltage) = 0.7(Ampere) x 3.2(Volt) = 2.24 Watt
The total power consumed by light is only
= P x num.leds = 2.24 x 5 = 11.5 Watt
I leave you comments ...
Ciao ciao Christian
Last edited by BlackHole; 05-04-2012 at 12:54 PM..