How much power do I need to run my LEDs?

Date Posted:12 March 2016 

How much power do I need to run my LEDs? This is a very important question. LEDs come in all shapes and sizes. They also come in all voltages and wattages (power consumption). A handy way of ensuring you have enough power to run your LEDs without damaging the power supply or your LEDs is to use this formula. 

P = VI .

P is the power in watts

V is the voltage in volts

I is the current in amps.

For example if you have a 12W 12V light than the current draw for this light will be 1A. 12=12x1. 

A good rule of thumb is to ensure that you only use 80% capacity of your power supply. this will ensure that the power supply is never overloaded. Therefore to supply the 12W light above, a 15W power supply would be needed. EG 15 x 0.8 = 12

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