# Does Voltage Matter For LED?

## Will low voltage damage LED lights?

As we mention above, under-driving LED strips by using a lower voltage than its rated voltage is completely safe and has no detrimental effects on the LEDs or the circuitry.

If anything, by driving them below their rated current, the LED strips’ theoretical lifetime and longevity will be even longer..

## Is 9v too much for an LED?

A 9V battery can’t supply very much current, but without series resistor the current may still be too much for the LEDs. … If the battery’s voltage decreases to 8.9V your LEDs will light (much) dimmer, or (much) brighter if the LEDs’ voltage is 4.4V, since the current will be much higher, and maybe become too high.

## Are all LEDs the same voltage?

All the LEDs connected in series pass the same current so it is best if they are all the same type. The power supply must have sufficient voltage to provide about 2V for each LED (4V for blue and white) plus at least another 2V for the resistor.

## How many LEDs can a 12v battery power?

The answer should be the source voltage divided by the voltage drop of 1 LED. So if your source is 12v, and your LEDs have a voltage drop of 3.5, 12/3.5v, gives you 3 LEDs. If the the forward voltage drop of the LEDs was exactly 3 volts, you’d be able to drive 4 of them, and would not need a current limiting resistor.

## Do I need a resistor for a 12v LED?

1 Answer. AFAIK there is no, or at least no common, led diode that is typically 12V forward voltage by it self. 12V led are modules that consist of some combination of diodes and resistors to make them suitable for 12V power applications without needing extra current limiting.

## Are 12v LEDs brighter than 5v?

5V is brighter than 12V as the 12V bullet pixels use half the current to stay somewhat close to 5V efficiency. Close, but 5V is still more efficient. So a 5V display will be brighter and use less power than a 12V display.

## How much power do LEDs use?

Cost Comparison Between LEDs, CFLs, and Incandescent Light BulbsLEDIncandescentLight bulb projected lifespan25,000 hours1,200 hoursWatts per bulb (equiv. 60 watts)8.560Cost per bulb\$5\$1KWh of electricity used over 25,000 hours212.515007 more rows

## What happens if voltage is too high?

Voltage that is too high can cause premature failure of electrical and electronic components (e.g. circuit boards) due to overheating. The damage caused by overheating is cumulative and irreversible.

## Does voltage affect LED brightness?

Adjusting the voltage lower or higher will change the brightness, but only because it also changes the current- higher voltage means the current will increase in an LED. … This is measured in amperes, or amps, but since it’s such a small amount of current, LEDs will be rated in milliamps (mA).

## What happens if you put too much voltage through an LED?

The answer to your title question is: The LED will light up. … Too much current will blow the LED. You limit the current to your desired value (often 15 to 20mA) by putting the correct resistance into the circuit. Use Ohm’s law to work that out.

## What resistor do I need for 12v LED?

For a typical white LED that requires 10mA, powered by 12V the values are: (12-3.4)/. 010=860 ohms. To use several LEDs in parallel, sum the current values.

## Will a 9v battery power a 12v LED?

that is no problem . you can use 9v battery for 12v Led . Just only the brightness is less than 12v battery .

## How long can a AAA battery power an LED?

An LED is fairly bright with a current of 20mA. Three 3V LEDs need a power of 3 x 3V x 20mA= 0.18W but the voltage boosting circuit needs about 0.1W so the total is 0.28W. An AAA alkaline cell will power them for 1W/0.28W= 3.6 hours.

## What color LED uses the least power?

Red LEDsRed LEDs have the lowest forward voltage ( 1.7 V – 2.3 V ) For the same forward current , that would represent the least power required to make it glow.

## How many amps does a 12v LED use?

10 AmpsFor example, a 120V LED system will pull 1 Amp in a 120 Watt system, while a 12V LED system will need to pull 10 Amps to power the same 120 Watt system.

## What does forward voltage on an LED mean?

The forward voltage defines the amount of voltage required for the current to flow through the diode junction. … Not only that, but the LED only drop its forward voltage at any given time. This point is what makes a diode or LED different from a resistor.

## How do I protect my led from High Voltage?

A surge protection subassembly that can suppress excessive surges to lower voltage levels is an optimal way to protect the LED luminaire investment. Metal Oxide Varistor (MOV) technology is not only inexpensive but also a highly effective technology for suppressing transients in power supplies.

## What is the maximum voltage a LED can withstand?

about 3.0 voltsThe maximum voltage applied it a single white LED is about 3.0 volts. Several LEDs in series can match a higher voltage supply, or a resistor (or other current limiting circuit) can be used to limit the current.

## What happens if you don’t use a resistor with an LED?

When hooking up an LED, you are always supposed to use a current-limiting resistor to protect the LED from the full voltage. If you hook the LED up directly to the 5 volts without a resistor, the LED will be over-driven, it will be very bright for a while, and then it will burn out.

## How do I connect 220 volts to LED?

How to AssembleConnect black anode of diode to negative of the led 0r as you want.connect the resistor to the positive of the LED or as you want but circuits should according to rules.Connect the free ends of the diode and resistor to the male pins.as shown in the pic.