Back story : I have cheap 12v LED 5050 strip from China. Question: how do LEDs respond to 13v and 14v in terms of % intensity with higher voltage neglecting lifespan and assuming proper heat dissipation. Details: the LEDs at 60/m rated 14.6w at 12v. They are typically 3led in series with a resistor per set x3 and the rest in parallel. I have 60led in parallel with a fan about 1w. The total current I measured with a 13v power supply is 1.6A. I am thinking about putting it on a 14v dc supply since they should be able to handle it since it was designed for car batteries which is about 14v with alternator. How much is the led actually brighter versus lost in efficiency in heat at the resitor. I don't know the register value in the strip but could find out if it's pertinent for the calculation.