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That depends on the current. The formula P=IV (where P is power in watts, I is current in amps and V is voltage in volts) is how you calculate the power. So if the current is 2 and the voltage is 3 then P=2x3=6Watts. Use an ammeter to determine the current.

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How many volts does 3 red led need to light?

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How many volts in a 60 Watt light bulb?

If a light bulb is rated at 60 Watts, the voltage will depend on the specific type of bulb. For a typical incandescent bulb, the voltage would be around 120 volts. However, for an LED or CFL bulb, the voltage could be different, such as 120 volts or 240 volts.


How many amps does it takes to light up a led 100 watt?

You need the volts times the amps to equal 100 Watts. On 12 v that is 8.33 amps, or on 200 v is it 0.5 amps.


How can you make a LED light up on only one 1.2 volt battery?

A: WELL you cannot not with 1,2v most LED start emitting at 1.8 v some as high as 5 volts . two need at least two 1.2 volts better is 9 volts then there is a problem voltage wise but the problem is now that you need a limiting resistor to ensure at least 10ma of current


How many watts can an led need to light up?

It depends on the color of the led you have. Normally it changes between 1.5 V and 2.5 V. But if you need to use white or purple leds those leds need more power like 4-5Volts. Im gonna calculate for a standart red led, a red led needs 20 mA and 2 volts to light up. So we know the formula that we can calculate how many watts does the led need, P = U * I P = 2 * 0.02 = 0.04 W. I used the average values. I hope I didnt make any mistake :)


How many lemons light up a LED?

The number of lemons needed to light up an LED depends on the type of LED and the voltage it requires. Typically, a single lemon can produce about 0.5 to 0.9 volts, so at least 2 to 3 lemons connected in series may be needed to generate enough voltage (around 2 volts) to power a standard LED. However, the exact number can vary based on the lemon's acidity and size.


How much voltage the infrared LED need to function?

Just under 2 volts


If you have two 3.6v led lights do you need a 7.2v battery?

No. Volts is the "pressure" of the electricity. If a single 3.6v led required 20 milliamps (amps is the "amount" of electricity) you would need to supply two of them with 40 milliamps but at 3.6 volts.


How do you convert 12 volts dc to 3 volts dc for LED?

Depends on the led forward bias threashold, if its a typical led it will be .7 volts so, .7x6=4.2V, so pick a resistor that will drop around 7 volts. What is the current? Then just to V=IR, 7=IR.


How does led light change color by volts?

LED light color can change based on the voltage applied due to the characteristics of the semiconductor material used in the LED. By adjusting the voltage, the energy level of the electrons in the semiconductor changes, causing the LED to emit light of different wavelengths and hence different colors. This allows for the color of the LED light to be controlled electronically.


How many potatoes does it take to light a LED bulb completely?

The number of potatoes needed to light an LED bulb depends on several factors, including the size and type of the potato, the LED bulb's voltage and current requirements, and the setup used. Typically, a single potato can produce about 0.5 volts and a small amount of current, so you would need several potatoes connected in series to achieve the necessary voltage to power an LED bulb. Generally, it may take around 5 to 10 potatoes to light a standard low-voltage LED bulb effectively.


How do you make an led light?

A: LED NEEDS at least 1.8v to light and a current of at least 10ma. Try 2 AAA battery in series and a 70 resistor if it doesn't light it means the voltage must be greater the 1.8v it could 5v volts.